US4665322 [A05] Nishimu Electronics Uninterruptible polyphase AC power supply

1. 3.2 기술연도표 1985 1987 1988 US4665322 [A05] Nishimu Electronics Uninterruptible polyphase AC power supply US4763014 [A06] American Telephone and Telegraph Backup protection switch To prevent reverse power flow in a UPS KR0055371 [A01] 도시바 무정전 전원장치 입력부 KR0117399 [A02] 알까뗄 엔 브이 비상 상태가 극성 반전으로 표시되는 비상 D.C. 전원 공급기 -134-

2. 1989 1991 1992 JP2568271 [A07] FUJI ELECTRIC DC UNINTERRUPTIBLE POWER SUPPLY UNIT JP3175121 [A11] YUASA UNINTERRUPTIBLE POWER SUPPLY JP2766140 [A15] SANSHA ELECTRIC UNINTERRUPTIBLE POWER SUPPLY DEVICE JP2583121 [A08] NIPPON TELEGR &amp DC UNINTERRUPTIBLE POWER SUPPLY UNIT JP2608621 [A12] TOSHIBA UNINTERRUPTIBLE POWER SOURCE JP3023631 [A16] HITACHI UNINTERRUPTIBLE POWER- SUPPLY DEVICE JP2533193 [A09] TOSHIBA POWER SUPPLY DEVICE JP2857263 [A13] ENERGY SUPPORT LOW VOLTAGE UNINTERRUPTIBLE SWITCHGEAR AND SWITCHING MEHTOD FOR TRANSFORMER JP2055956 [A10] MITSUBISHI ELECTRIC UNINTERRUPTIBLE POWER SUPPLY CONTROLLER JP3016927 [A14] NICHICON POWER SUPPLY DEVICE -135-

3. 1993 1995 1997 JP3279712 [A17] TOSHIBA UNINTERRUPTIVE POWER SUPPLY JP3287157 [A20] SHIN KOBE ELECTRIC UNINTERRUPTIBLE POWER SUPPLY DEVICE KR0225769 [A03] 한국전기연구원 단상소형 무정전 전원장치 JP2923416 [A18] SANYO DENKI UNINTERRUPTIBLE POWER SUPPLY JP3038652 [A21] NEC UNINTERRUPTIBLE POWER UNIT JP3263638 [A22] SANYO DENKI UNINTERRUPTIVE POWER SUPPLY DEVICE JP2803705 [A19] NEC CATV UNINTERRUPTIBLE POWER SOURCE JP3114673 [A23] NEC UNINTERRUPTIVE POWER SUPPLY HAVING REDUNDANT FUNCTION -136-

4. 1998 1999 2000 JP3430894 [A24] SHODENRYOKU KOGYO POWER LOSS REDUCTION METHOD BY CONVERTING WHOLE POWER INTO DC POWER AND DC-CONTROLLED UNINTERRUPTED POWER SUPPLY SYSTEM EMPLOYING THIS METHOD JP2997782 [A28] UNIV OSAKA POWER SUPPLY DEVICE ACCORDING TO QUALITY JP3404349 [A29] SANYO DENKI, NTT DATA UNINTERRUPTIBLE POWER SOURCE AND METHOD FOR OPERATING THE SAME JP3082849 [A25] SANKEN ELECTRIC UNINTERRUPTIVE POWER SUPPLY JP3361461 [A26] NTT DATA, SHINANO DENKI POWER SUPPLY AND SUPPLY METHOD FOR POWER JP3188239 [A27] NTT POWER &amp AC UNINTERRUPTIBLE POWER SUPPLY DEVICE -137-

5. 2001 2002 KR0428780 [A04] 삼성전자 순시정전에 따른 설비의 오동작을 방지하는 전력 공급장치 및 이를 용한 반도체 제조 설비 JP2004096831A2(공개) [A30] FUJI ELECTRIC CONTINUOUS COMMERCIAL FEEDING TYPE UNINTERRUPTIBLE POWER SUPPLY -138-

6. 1984 1985 1986 US4562357 [B61] Tokyo Shibaura Denki Uninterruptible power supply and a starting method US4642475 [B02] Siemens Aktiengesellschaft Uninterruptible power supply KR0070007 [59] 엑사이드 일렉트로닉스 인터내셔널 안정화 전력 공급 시스템 인버터 US4645940 [B35] Grumman Aerospace Interrupt-free, unregulated power supply US4673825 [B62] Exide Electronics Uninterruptible power supply with isolated bypass winding -139-

7. 1988 1989 JP2662967 [B37] SHINDENGEN ELECTRIC UNDER AND OVER LOAD CURRENT AND VOLTAGE DETECTOR CIRCUIT FOR UNINTERRUPTIVE POWER SUPPLY JP2849598 [B67] NISHIMU DENSHI DEVICE FOR PARALLEL OPERATION TRI-PORT UNINTERRUPTIBLE POWER UNIT JP2656353 [B03] TOSHIBA UNINTERRUPTIBLE POWER SUPPLY DEVICE JP2891721 [B04] NIPPON ELECTRIC BACK-UP CIRCUIT FOR UNINTERRUPTIBLE POWER SUPPLY JP2645058 [B38] TOSHIBA UNINTERRUPTIBLE POWER SUPPLY EQUIPMENT JP2061818 [B05] SHINDENGEN ELECTRIC UNINTERRUPTIVE POWER SUPPLY JP2728682 [B39] HITACHI UNINTERRUPTIBLE POWER SUPPLY SOURCE DEVICE FOR COMPUTER JP2703976 [B42] TOSHIBA PARALLEL RUNNING CONTROLLER FOR INVERTER JP2761538 [B40] NIPPON TELEGR &amp UNINTERRUPTIBLE POWER SOURCE EQUIPMENT -140-

8. 1990 1991 JP2065274 [B06] SHIKOKU ELECTRIC UNINTERRUPTIBLE SWITCH FOR DISTRIBUTION LINE JP3140042 [B46] HITACHI POWER CONVERTER, CONTROL METHOD THEREFOR AND UNINTERRUPTIBLE POWER SUPPLY JP3057332 [B08] HITACHI UNINTERRUPTIBLE POWER SUPPLY AND SWITCHING METHOD JP2017568 [B07] MEIDENSHA OPERATION CONFIRMING METHOD FOR UNINTERRUPTIBLE SWITCHER FOR DISTRIBUTION LINE JP3079610 [B09] MEIDENSHA DEVICE FOR TAKING MEASURE AGAINST POWER UNBALANCE JP2809498 [B68] HITACHI UNINTERRUPTIBLE POWER SOURCE SYSTEM JP3005804 [B43] HITACHI POWER CONVERTER AND UNINTERRUPTIBLE POWER SUPPLY JP2722786 [B10] NIPPON TELEGR &amp UNITERRUPTIBLE DC POWER SUPPLY SYSTEM JP2534792 [B41] TOSHIBA UNINTERRUPTIPLE POWER SUPPLY DEVICE JP2984321 [B44] EXIDE ELECTRON UNINTERRUPTIBLE POWER SUPPLY WITH NO MAGNETIC UNIT FOR LOW FREQUENCY POWER JP2827625 [B11] NEC UNINTERRUPTIBLE POWER SUPPLY JP8256482A2(공개) [B45] NAKANO HIROTAMI UNINTERRUPTIBLE POWER UNIT, AND ITS INSULATION METHOD AND ITS POWER SUPPLY METHOD US5182518 [B36] Best Power Technology Inverter and battery testing for uninterruptible power systems -141-

9. 1991(계속) 1992 JP2989029 [B47] TOYO ELECTRIC UNINTERRUPTIBLE POWER SOURCE JP3264285 [B12] SANYO ELECTRIC UNINTERRUPTIBLE POWER SUPPLY JP2702048 [B50] NIPPON PUROTEKUTAA HANBAI UNINTERRUPTIBLE SWITCHING REGULATOR JP2724324 [B13] HITACHI UNINTERRUPTIBLE POWER-SUPPLY SYSTEM JP2838455 [B69] SANSHA ELECTRIC UNINTERRUPTIBLE POWER SUPPLY JP3147257 [B14] JAPAN STORAGE BATTERY SYSTEM-LINKED POWER SUPPLY SYSTEM JP3237220 [B48] MEIDENSHA HARMONIC SUPPRESSOR JP2673921 [B49] SANYO DENKI UNINTERRUPTIBLE POWER SUPPLY -142-

10. 1993 1994 JP3306943 [B15] FUJI ELECTRIC AC SWITCH CHANGE-OVER METHOD OF UNINTERRUPTIBLE POWER SUPPLY APPARATUS AND HYBRID AC SWITCH JP3314789 [B52] FUJI ELECTRIC INVERTER DRIVING APPARATUS JP3364000 [B19] YUTAKA DENKI SEISAKUSHO UNINTERRUPTIVE POWER UNIT JP2778485 [B20] MITSUBISHI ELECTRIC UNINTERRUPTIBLE POWER SUPPLY DEVICE US5446645 [B63] Hitachi Inverter apparatus and uninterruptible power supply using the same JP3115143 [B16] TOSHIBA UNINTERRUPTIBLE POWER SUPPLY JP3467870 [B21] MEIDENSHA LEAKAGE PREVENTIVE CIRCUIT FOR THYRISTOR SWITCH IN UNINTERRUPTIBLE POWER SUPPLY JP3469918 [B17] SHINANO DENKI UNINTERRUPTIBLE POWER SUPPLY DEVICE JP3446773 [B53] SHIN KOBE ELECTRIC UNINTERRUPTIBLE POWER SUPPLY JP2767535 [B18] SANSHA ELECTRIC BOOSTING TYPE OF UNINTERRUPTIVE POWER UNIT JP3130160 [B51] MITSUBISHI ELECTRIC UNINTERRUPTIBLE POWER-SUPPLY APPARATUS -143-

11. 1995 1996 JP3417117 [B22] FUJI ELECTRIC MAINTENANCE METHOD FOR UNINTERRUPTIBLE POWER SUPPLY JP3345793 [B54] NIPPON DENSAN SETSUBI ABNORMALITY DETECTOR FOR UNINTERRUPTIVE POWER SUPPLY JP3497673 [B27] SANSHA ELECTRIC TRANSVERSAL FLOW CURRENT FLOW PREVENTING CIRCUIT FOR UNINTERRUPTIBLE POWER UNIT JP3470773 [B23] NIPPON TELEGR &amp DC UNINTERRUPTIBLE POWER- SUPPLY SYSTEM JP2917871 [B55] NIPPON PUROTEKUTAA UNINTERRUPTIBLE SWITCHING REGULATOR JP10174437A2(공개) [B56] HITSUTSU KENKYUSHO,CHIYODA UNINTERRUPTIBLE POWER SUPPLY SYSTEM JP3543432 [B24] MEIDENSHA UNINTERRUPTIBLE POWER UNIT US5602462 [B64] Best Power Technology Uninterruptible power system JP3338921 [B25] FUJITSU UNINTERRUPTIBLE POWER UNIT JP3428242 [B26] FUJI ELECTRIC UNINTERRUPTICLE POWER UNIT -144-

12. 1997 1998 1999 JP3541121 [B28] FANUC EMERGENCY POWER SUPPLY FOR COPING WITH SERVICE INTERRUPTION JP2940536 [B29] FUJI ELECTRIC UNINTERRUPTIVE POWER SUPPLY KR0300813 [B31] 세방산업 유피에스의 인버터에 있어서 정현파 구현방법 JP3267549 [B57] NEC UNINTERRUPTIVE POWER SUPPLY AND ITS FEED SWITCHING METHOD KR0284050 [B60] (주)엔이티 직병렬 무정전 전원 장치(UPS)와 이 장치의 제어 방법 -145-

13. 2000 2001 2002 KR0387588 [B32] 포스코신기술연구조합 입출력 위상차를 가지는 유피에스의 위상차 제거 바이패스방법 JP2003009427A2(공개) [B30] FUJI ELECTRIC COMMERCIAL POWER LATCHING CIRCUIT FOR CONTINUOUS COMMERCIAL POWER SUPPLYING UNINTERRUPTIBLE POWER SUPPLY KR2004-0001646(공개) [B01] 정환명,최재호 비절연형 무정전 전원공급 장치 US6218744 [B65] Powerware Uninterruptible power supply and ferroresonant transformer for use therewith KR2003-0080614(공개) [B33] 최규하 온라인 무정전 전원장치의 병렬 제어기 KR2004-0036337(공개) [B34] 월드탑텍(주) 정현파 발생 회로, 이를 이용한 무정전 전원 장치 US6577513 [B66] DigiPower Manufacturing Lighting equipment built-in on-line uninterruptible power system capable of outputting AC sinusoidal power from a single DC source -146-

14. 2003 JP200304651A2(공개) [B58] NTT DATA UNINTERRUPTIBLE POWER SUPPLY UNIT -147-

15. 1986 1987 1988 KR0031685 [C01] 엘지이아이 부동충전용 축전지 전원공급장치 JP2563177 [C08] NIPPON TELEGR &amp STORAGE BATTERY OVERDISCHARGE PREVENTING SYSTEM OF DC UNINTERRUPTIBLE POWER SUPPLY BY HIGH FREQUENCY SIGNAL SUPERPOSITION US4827151 [C05] Toshiba Uninterruptible power supply utilizing a synchronized chopper for power factor improvement 충전부 JP2000375 [C24] MITSUBISHI ELECTRIC STORAGE-BATTERY PROTECTING METHOD FOR UNINTERRUPTIBLE INVERTER JP2829954 [C47] MITSUBISHI ELECTRIC COMBINATION OF STAND-BY GENERATOR WITH POWER SYSTEM JP2867395 [C09] MEIDENSHA UNINTERRUPTIVE POWER SUPPLY -148-

16. 1989 1990 JP2949588 [C25] HITACHI PROTECTIVE METHOD FOR BATTERY FOR UNINTERRUPTIBLE POWER EQUIPMENT AND UNINTERRUPTIBLE POWER EQUIPMENT KR0071616 [C02] 도시바 무정전 전원장치 JP2901158 [C28] SHINDENGEN ELECTRIC UNINTERRUPTIBLE POWER SUPPLY JP2844906 [D41] YUASA NON-INTERRUPTING POWER SUPPLY APPARATUS JP3011754 [C29] YUASA EMERGENCY POWER SUPPLY SYSTEM JP2004623 [C26] JAPAN STORAGE BATTERY UNINTERRUPTIBLE AC POWER SUPPLY JP1898668 [C10] FUJITSU EMERGENCY POWER SUPPLY DEVICE FOR TAPE DECK JP2117486 [C27] FURUKAWA BATTERY OVERDISCHARGE PREVENTING CIRCUIT OF STORAGE BATTERY IN UNINTERRUPTIBLE DC CURRENT SUPPLY JP2653235 [C11] FUJITSU UNINTERRUPTIBLE POWER SUPPLY AND DISCHARGE TERMINATION DETECTING METHOD US5148043 [C22] Toshiba Uninterruptible power supply Diagnosing remaining battery capacity during normal external power source operation -149-

17. 1991 1992 1993 US5185536 [C06] Exide Electronics Uninterruptible power supply having improved battery charger JP2617846 [C31] SANSHA ELECTRIC UNINTERRUPTIBLE POWER SOURCE JP2749502 [C13] FUJI ELECTRIC METHOD FOR JUDGING QUALITY OF STORAGE BATTERY OF UNINTERRUTIBLE POWER SUPPLY UNIT JP2847328 [C12] HITACHI UNINTERRUPTIVE POWER SUPPLY AND ITS METHOD OF OPERATION AND BATTERY CHARGER JP2956372 [C32] SANYO DENKI UNINTERRUPTIBLE POWER SOURCE JP3223659 [C34] OMRON UNINTERRUPTIBLE POWER SUPPLY JP3177721 [C33] JAPAN STORAGE BATTERY MEASUREMENT OF BATTERY RESIDUAL CAPACITY ON UNINTERRUPTIBLE POWER UNIT JP2896242 [C48] MEIDENSHA UNINTERRUTIBLE SELECTIVE CIRCUIT BREAKER IN PRIVATE GENERATING EQUIPMENT PROVIDED IN PARALLEL WITH COMMERCIAL DISTRIBUTION LINE JP3235193 [C49] MEIDENSHA GENERATOR FOR UNINTERRUPTIBLE CHANGE-OVER -150-

18. 1994 1995 1996 JP2900124 [C14] OMRON UNINTERRUPTIBLE POWER SUPPLY JP3216969 [C50] NIPPON TELEGR &amp UNINTERRUPTIBLE SOLAR POWER GENERATION SYSTEM JP3322116 [C16] SHIN KOBE ELECTRIC BATTERY DETERIORATION CONDITION TESTING DEVICE FOR AC UNINTERRUPTIVE POWER SUPPLY JP3075103 [C15] NIPPON TELEGR &amp METHOD AND CIRCUIT FOR MEASURING CAPACITY OF STORAGE BATTERY US5760495 [C23] Alpha Technologies Inverter/charger circuit for uninterruptible power supplies JP3490234 [C36] SHINDENGEN ELECTRIC UNINTERRUPTIVE POWER SUPPLY UNIT JP3317599 [C35] TOSHIBA UNINTERRUPTIBLE POWER SUPPLY -151-

19. 1997 1998 1999 US6016017 [C07] Motorola System for providing an uninterrupted supply voltage and method JP3191097 [C19] TAIDA ELECTRON UNINTERRUPTIBLE POWER-SUPPLY APPARATUS AND ITS CHARGING CONTROL METHOD JP3402357 [C39] SANKEN ELECTRIC LIFE DIAGNOSIS FOR BATTERY OF UNINTERRUPTIBLE POWER SUPPLY JP3221367 [C17] NEC UNINTERRUPTIVE POWER SUPPLY UNIT AND ITS START METHOD JP20014043A2(공개) [C37] INTERNATL BUSINESS, IBM UNINTERRUPTIVE POWER SUPPLY JP3179385 [C18] NEC LEAD-ACID BATTERY REPLACEMENT TIME RECOGNITION METHOD AND UNITERRUPTIBLE POWER SUPPLY DEVICE USING THE METHOD JP3513393 [C38] MITSUBISHI ELECTRIC UNINTERRUPTIVE POWER SUPPLY KR0280415 [C21] 현대반도체 무정전전원공급장치 -152-

20. 2000 2001 KR2003-0013701(공개) [C04] 파워로직스 무정전 전원 공급 장치의 축전지에 의한 런타임 제어 방법 KR2002-0015465(공개) [C03] (주) 파비온 무정전 스위칭 모드 전원 장치 JP22238184A2(공개) [C51] YANMAR DIESEL ENGINE UNINTERRUPTIBLE POWER GENERATOR BY ENGINE GENERATOR JP2003164074A2(공개) [C20] SHIN KOBE ELECTRIC CONTROL METHOD FOR CHARGER OF UNINTERRUPTIBLE POWER SUPPLY SYSTEM JP3505124 [C40] TOKYO ELECTRIC POWER EMERGENCY POWER SOURCE SYSTEM AND SYSTEM FOR AUTOMATICALLY DETECTING SINGLE CELL FAULT IN BATTERY USED FOR THE SYSTEM JP2002287857A2(공개) [C42] YUASA UNINTERRUPTIVE POWER SUPPLY AND BATTERY REPLACEMENT PROMOTION SYSTEM JP2002101569A2(공개) [C41] TOSHIBA BATTERY UNINTERRUPTIVE POWER SUPPLY DEVICE JP2002345166A2(공개) [C43] SANSHA ELECTRIC METHOD OF DETERMINING DETERIORATION OF STORAGE BATTERY USED IN UNINTERRUPTIBLE POWER SUPPLY US6737762 [C46] Onan Generator with DC boost for uninterruptible power supply system or for enhanced load pickup -153-

21. 2002 JP2004032942A2(공개) [C44] FUJI ELECTRIC METHOD FOR CHARGING UNCHARGED SECONDARY BATTERY OF CONTINUOUS COMMERCIAL POWER SUPPLY TYPE UNINTERRUPTIBLE POWER SUPPLY DEVICE KR0429914 [C45] 포항공과대학교 플라이휠을 이용한 비상발전시스템 -154-

22. 1985 1987 1988 KR0031836 [D01] 도시바 전원시스템 및 그의 제어방법 JP2545542 [D30] HITACHI TWO-CIRCUIT SUPPLY UNINTERRUPTIBLE TRANSFER PROTECTOR JP2037249 [D32] FUJI ELECTRIC UNINTERRUPTIVE POWER SUPPLY 제어부 KR0026355 [D02] 동양정밀공업 교류 전원 공급 회로 JP01218329A2(공개) [D33] TAKAOKA ELECTRIC SYNCHRONIZATION DETECTING CIRCUIT JP2655153 [D31] TAKAMISAWA CYBERNETICS UNINTERRUPTIBLE POWER SOURCE OUTPUT SYNCHRONIZING SYSTEM JP2649939 [D34] SHINDENGEN ELECTRIC UNINTERRUPTIBLE POWER SOURCE EQUIPMENT JP2682012 [D35] JAPAN STORAGE POWER INTERRUPTION DETECTING CIRCUIT FOR AC UNINTERRUPTIBLE POWER SOURCE EQUIPMENT JP2674117 [D36] JAPAN STORAGE BATTERY AC UNINTERRUPTIBLE POWER SYSTEM -155-

23. 1998(계속) 1989 1990 JP2607928 [D37] KAWASOO TEKUSERU UNINTERRUPTIBLE HIGH VOLTAGE METERING TRANSFORMER REPLACING DEVICE US5053635 [D25] Atlas Energy Systems Uninterruptible power supply with a variable speed drive driving a s ynchronous motor/generator JP3190666 [D40] BEST POWER TECHNOL METHOD AND DEVICE FOR MONITORING POWER SUPPLY POWER FOR SUPPLYING UNINTERRUPTIBLE POWER JP2793264 [D38] TOSHIBA UNINTERRUPTIBLE POWER SUPPLY JP2778167 [D39] MEIDENSHA PROTECTIVE DEVICE FOR UNINTERRUPTIBLE POWER SYSTEM -156-

24. 1992 1993 1994 JP3051771 [D41] NIPPEI TOYAMA DATA PROTECTION DEVICE JP2500592 [D45] NEC NON INTERRUPTING POWER SUPPLY APPARATUS KR0127218 [D03] 엘지산전 히스테리시스 밴드를 가지는 유피에스(UPS)의 정,복전방법 JP30416621 [D43] HITACHI CONTROLLING METHOD AND DEVICE FOR PARALLEL OPERATION OF INVERTER, AND UNINTERRUPTIBLE POWER SUPPLY DEVICE JP3433469 [D46] OMRON UNINTERRUPTIBLE POWER-SUPPLY DEVICE US5532525 [D26] Albar Congeneration power system JP3246138 [D47] SHIN KOBE ELECTRIC UNINTERRUPTIBLE POWER SUPPLY APPARATUS JP3438288 [D49] MEIDENSHA UNINTERRUPTIBE DIFFERENT POWER SUPPLY SWITCHING SYSTEM JP3292315 [D44] SANYO ELECTRIC UNINTERRUPTIBLE POWER SUPPLY EQUIPMENT JP3278272 [D48] MISAWA HOMES EMERGENCY POWER SUPPLY APPARATUS JP3286462 [D50] CHUBU ELECTRIC POWER UNINTERRUPTIBLE SWITCHER FOR HIGH VOLTAGE MACHINE JP3254918 [D51] FUJI ELECTRIC POWER CONVERSION UNIT FOR UNINTERRUPTIBLE POWER SUPPLY -157-

25. 1994(계속) 1995 1996 JP3394333 [D52] MIHARU TSUSHIN MONITORING METHOD FOR POWER SOURCE OF UNINTERRUPTIBLE POWER SUPPLY IN CATV SYSTEM EQUIPPED WITH UNINTERRUPTIBLE POWER SUPPLY JP3475590 [D55] MEIDENSHA UNINTERRUPTIBLE POWER SUPPLY SWITCHING CAR AND BIDIRECTIONAL UNINTERRUPTIBLE POWER SUPPLY SWITCHING METHOD FOR DISTRIBUTION LINE BY THE SAID CAR KR0178240 [D04] 대우전자 정전 보상 회로 KR0195864 [D05] 삼성전자 전력공급제어장치 및 그 제어방법 JP3400873 [53] YUASA UNINTERRUPTIBLE POWER SUPPLY JP3032953 [D56] SANSHA ELECTRIC CURRENT DETECTOR OF UNINTERRUPTIBLE POWER UNIT US5825099 [D27] SamSung Electronics Uninterruptible power supply circuit JP3282122 [54] NIPPON TELEGR &amp NO-MOMENTARY-INTERRUPTION CHANGEOVER CIRCUIT JP3502505 [D57] HITACHI UNINTERRUPTIBLE POWER-SUPPLY APPARATUS JP3467525 [D58] MITSUBISHI POWER SUPPLY CONTROL SYSTEM -158-

26. 1996(계속) 1997 1998 JP3171794 [D73] I S A UNIVERSAL POWER SUPPLY AND CONTINUOUS OPERATION THEREOF JP3497688 [D59] TOSHIBA UNINTERRUPTIBLE POWER SUPPLY DEVICE KR0345280 [D06] (주)엔이티 직병렬무정전전원장치(UPS)용 혼합히스테리시스변조방법 JP3519899 [D60] SANYO ELECTRIC UNINTERRUPTIBLE POWER SUPPLY UNIT JP11081835A2(공개) [D61] SANWA SHUTTER SHUTTER EMERGENCY POWER SUPPLY DEVICE -159-

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