EP913357-A1  PATENT ABSTRACTS OF JAPAN vol. 008, no. 067 (C-216), 29 March 1984 & JP 58 219945 A (MATSUSHITA DENKI SANGYO KK), 21 December 1983;  PATENT ABSTRACTS OF JAPAN vol. 016, no. 040 (C-0906), 31 January 1992 & JP 03 247501 A (MITSUBISHI HEAVY IND LTD), 5 November 1991;  PATENT ABSTRACTS OF JAPAN vol. 016, no. 283 (C-0955), 24 June 1992 & JP 04 074701 A (FUJI ELECTRIC CO LTD), 10 March 1992;  PATENT ABSTRACTS OF JAPAN vol. 017, no. 533 (C-1114), 27 September 1993 & JP 05 147903 A (FUJI ELECTRIC CO LTD), 15 June 1993;  PATENT ABSTRACTS OF JAPAN vol. 008, no. 067 (C-216), 29 March 1984&JP 58 219945 A (MATSUSHITA DENKI SANGYO KK), 21 December 1983;  PATENT ABSTRACTS OF JAPAN vol. 016, no. 040 (C-0906), 31 January 1992&JP 03 247501 A (MITSUBISHI HEAVY IND LTD), 5 November 1991;  PATENT ABSTRACTS OF JAPAN vol. 016, no. 283 (C-0955), 24 June 1992&JP 04 074701 A (FUJI ELECTRIC CO LTD), 10 March 1992;  PATENT ABSTRACTS OF JAPAN vol. 017, no. 533 (C-1114), 27 September 1993&JP 05 147903 A (FUJI ELECTRIC CO LTD), 15 June 1993US6641795-B2  Patent Abstracts of Japan; vol. 008, No. 067 (C-216); Mar. 29, 1984 & JP 58 219945 A (Matsushita Denki Sangyo KK); Dec. 21, 1983 *abstract*.;  Patent Abstracts of Japan; vol. 016, No. 040 (C-0906); Jan. 31, 1992 & JP 03 247501 A (Mitsubishi Heavy Ind Ltd); Nov. 5, 1991 *abstract*.;  Patent Abstracts of Japan; vol. 016, No. 283 (C-0955); Jun. 24, 1992 & JP 04 074701 A (Fuji Electric Co Ltd); Mar. 10, 1992 *abstract*.;  Patent Abstracts of Japan; vol. 017, No. 533 (C-1114); Sep. 27, 1993 & JP 05 147903 A (Fuji Electric Co Ltd); Jun. 15, 1993 *abstract*.EP913357-B1  PATENT ABSTRACTS OF JAPAN vol. 008, no. 067 (C-216), 29 March 1984 & JP 58 219945 A (MATSUSHITA DENKI SANGYO KK), 21 December 1983;  PATENT ABSTRACTS OF JAPAN vol. 016, no. 040 (C-0906), 31 January 1992 & JP 03 247501 A (MITSUBISHI HEAVY IND LTD), 5 November 1991;  PATENT ABSTRACTS OF JAPAN vol. 016, no. 283 (C-0955), 24 June 1992 & JP 04 074701 A (FUJI ELECTRIC CO LTD), 10 March 1992;  PATENT ABSTRACTS OF JAPAN vol. 017, no. 533 (C-1114), 27 September 1993 & JP 05 147903 A (FUJI ELECTRIC CO LTD), 15 June 1993