WO200180621-A2  DATABASE WPI Section Ch, Week 197811 Derwent Publications Ltd., London, GB; Class A85, AN 1978-20599A XP002192202 & JP 53 012031 A (MATSUSHITA ELEC IND CO LTD), 3 February 1978 (1978-02-03);  DATABASE WPI Section Ch, Week 197827 Derwent Publications Ltd., London, GB; Class A18, AN 1978-48483A XP002192200 & JP 53 058622 A (MATSUSHITA ELEC IND CO LTD), 26 May 1978 (1978-05-26);  DATABASE WPI Section Ch, Week 197939 Derwent Publications Ltd., London, GB; Class A85, AN 1979-70451B XP002192201 & JP 54 103512 A (MATSUSHITA ELEC IND CO LTD), 15 August 1979 (1979-08-15);  PATENT ABSTRACTS OF JAPAN vol. 008, no. 194 (E-264), 6 September 1984 (1984-09-06) & JP 59 083354 A (MATSUSHITA DENKI SANGYO KK), 14 May 1984 (1984-05-14);  PATENT ABSTRACTS OF JAPAN vol. 012, no. 162 (E-609), 17 May 1988 (1988-05-17) & JP 62 274568 A (MATSUSHITA ELECTRIC IND CO LTD), 28 November 1987 (1987-11-28);  PATENT ABSTRACTS OF JAPAN vol. 012, no. 162 (E-609), 17 May 1988 (1988-05-17) & JP 62 274569 A (MATSUSHITA ELECTRIC IND CO LTD), 28 November 1987 (1987-11-28);  PATENT ABSTRACTS OF JAPAN vol. 014, no. 444 (E-0982), 21 September 1990 (1990-09-21) & JP 02 177254 A (MATSUSHITA ELECTRIC IND CO LTD), 10 July 1990 (1990-07-10);  PATENT ABSTRACTS OF JAPAN vol. 008, no. 194 (E-264), 6 September 1984 (1984-09-06)&JP 59 083354 A (MATSUSHITA DENKI SANGYO KK), 14 May 1984 (1984-05-14);  DATABASE WPI Section Ch, Week 197811 Derwent Publications Ltd., London, GB; Class A85, AN 1978-20599A XP002192202&JP 53 012031 A (MATSUSHITA ELEC IND CO LTD), 3 February 1978 (1978-02-03);  DATABASE WPI Section Ch, Week 197827 Derwent Publications Ltd., London, GB; Class A18, AN 1978-48483A XP002192200&JP 53 058622 A (MATSUSHITA ELEC IND CO LTD), 26 May 1978 (1978-05-26);  PATENT ABSTRACTS OF JAPAN vol. 012, no. 162 (E-609), 17 May 1988 (1988-05-17)&JP 62 274569 A (MATSUSHITA ELECTRIC IND CO LTD), 28 November 1987 (1987-11-28);  DATABASE WPI Section Ch, Week 197939 Derwent Publications Ltd., London, GB; Class A85, AN 1979-70451B XP002192201&JP 54 103512 A (MATSUSHITA ELEC IND CO LTD), 15 August 1979 (1979-08-15);  PATENT ABSTRACTS OF JAPAN vol. 012, no. 162 (E-609), 17 May 1988 (1988-05-17)&JP 62 274568 A (MATSUSHITA ELECTRIC IND CO LTD), 28 November 1987 (1987-11-28);  PATENT ABSTRACTS OF JAPAN vol. 014, no. 444 (E-0982), 21 September 1990 (1990-09-21)&JP 02 177254 A (MATSUSHITA ELECTRIC IND CO LTD), 10 July 1990 (1990-07-10)