WO2004009220-A1  DATABASE WPI Section Ch, Week 199324 Derwent Publications Ltd., London, GB; Class H06, AN 1993-190847 XP002033242 & JP 05 115751 A (TOKYO GAS CO LTD), 14 May 1993 (1993-05-14);  PATENT ABSTRACTS OF JAPAN vol. 1996, no. 04, 30 April 1996 (1996-04-30) & JP 07 323215 A (MAZDA MOTOR CORP), 12 December 1995 (1995-12-12);  PATENT ABSTRACTS OF JAPAN vol. 1996, no. 10, 31 October 1996 (1996-10-31) & JP 08 164338 A (MAZDA MOTOR CORP), 25 June 1996 (1996-06-25);  PATENT ABSTRACTS OF JAPAN vol. 1997, no. 11, 28 November 1997 (1997-11-28) & JP 09 192486 A (MAZDA MOTOR CORP), 29 July 1997 (1997-07-29);  PATENT ABSTRACTS OF JAPAN vol. 1997, no. 11, 28 November 1997 (1997-11-28)&JP 09 192486 A (MAZDA MOTOR CORP), 29 July 1997 (1997-07-29);  PATENT ABSTRACTS OF JAPAN vol. 1996, no. 10, 31 October 1996 (1996-10-31)&JP 08 164338 A (MAZDA MOTOR CORP), 25 June 1996 (1996-06-25);  PATENT ABSTRACTS OF JAPAN vol. 1996, no. 04, 30 April 1996 (1996-04-30)&JP 07 323215 A (MAZDA MOTOR CORP), 12 December 1995 (1995-12-12);  DATABASE WPI Section Ch, Week 199324 Derwent Publications Ltd., London, GB; Class H06, AN 1993-190847 XP002033242&JP 05 115751 A (TOKYO GAS CO LTD), 14 May 1993 (1993-05-14)NL1021116-C2  DATABASE WPI Section Ch, Week 199324 Derwent Publications Ltd., London, GB; Class H06, AN 1993-190847 XP002033242 & JP 05 115751 A (TOKYO GAS CO LTD), 14 Mei 1993 (1993-05-14);  PATENT ABSTRACTS OF JAPAN vol. 1996, no. 04, 30 April 1996 (1996-04-30) & JP 07 323215 A (MAZDA MOTOR CORP), 12 December 1995 (1995-12-12);  PATENT ABSTRACTS OF JAPAN vol. 1996, no. 10, 31 Oktober 1996 (1996-10-31) & JP 08 164338 A (MAZDA MOTOR CORP), 25 Juni 1996 (1996-06-25);  PATENT ABSTRACTS OF JAPAN vol. 1997, no. 11, 28 November 1997 (1997-11-28) & JP 09 192486 A (MAZDA MOTOR CORP), 29 Juli 1997 (1997-07-29);  PATENT ABSTRACTS OF JAPAN vol. 1997, no. 11, 28 November 1997 (1997-11-28)&JP 09 192486 A (MAZDA MOTOR CORP), 29 Juli 1997 (1997-07-29);  PATENT ABSTRACTS OF JAPAN vol. 1996, no. 10, 31 Oktober 1996 (1996-10-31)&JP 08 164338 A (MAZDA MOTOR CORP), 25 Juni 1996 (1996-06-25);  PATENT ABSTRACTS OF JAPAN vol. 1996, no. 04, 30 April 1996 (1996-04-30)&JP 07 323215 A (MAZDA MOTOR CORP), 12 December 1995 (1995-12-12);  DATABASE WPI Section Ch, Week 199324 Derwent Publications Ltd., London, GB; Class H06, AN 1993-190847 XP002033242&JP 05 115751 A (TOKYO GAS CO LTD), 14 Mei 1993 (1993-05-14);  PATENT ABSTRACTS OF JAPAN vol. 1997, no. 11 28 November 1997 (1997-11-28),relevantClaims[12-16],relevantPassages[&lt;pp&gt;A&lt;/pp&gt;];  PATENT ABSTRACTS OF JAPAN vol. 1996, no. 10 31 October 1996 (1996-10-31),relevantClaims[12-16],relevantPassages[&lt;pp&gt;A&lt;/pp&gt;];  PATENT ABSTRACTS OF JAPAN vol. 1996, no. 04 30 April 1996 (1996-04-30),relevantClaims[12-16],relevantPassages[&lt;pp&gt;A&lt;/pp&gt;];  DATABASE WPI Section Ch Week 199324, Derwent Publications Ltd., London, GB; Class H06, AN 1993-190847, XP002033242,relevantClaims[1-11],relevantPassages[&lt;pp&gt;A&lt;/pp&gt;]