EP911895-A1  CHEMICAL ABSTRACTS, vol. 125, no. 2, 8 July 1996 Columbus, Ohio, US; abstract no. 15128, ISHIZAWA, MAKI ET AL: "Portable fuel cell system for telecommunications use" XP000666114 & DENKI KAGAKU OYOBI KOGYO BUTSURI KAGAKU (1996), 64(6), 454-459 CODEN: DKOKAZ;ISSN: 0366-9297,1996,;  GALEN R. FRYSINGER: "The economical fuel cell" I.E.E.E. SPECTRUM, vol. 6, no. 3, March 1969, pages 83-90, XP002090617;  ISHIZAWA M ET AL: "PORTABLE FUEL-CELL SYSTEMS" NTT REVIEW, vol. 9, no. 5, September 1997, pages 65-69, XP000704773;  PATENT ABSTRACTS OF JAPAN vol. 096, no. 009, 30 September 1996 -& JP 08 131382 A (MATSUSHITA ELECTRIC IND CO LTD), 28 May 1996;  PATENT ABSTRACTS OF JAPAN vol. 097, no. 008, 29 August 1997 -& JP 09 092318 A (NIPPON TELEGR &AMP;TELEPH CORP &LT;NTT&GT;), 4 April 1997;  PATENT ABSTRACTS OF JAPAN vol. 097, no. 010, 31 October 1997 & JP 09 171842 A (SANYO ELECTRIC CO LTD;NIPPON TELEGR &AMP; TELEPH CORP &LT;NTT&GT;), 30 June 1997;  PATENT ABSTRACTS OF JAPAN vol. 097, no. 008, 29 August 1997 -&JP 09 092318 A (NIPPON TELEGR&TELEPH CORP NTT), 4 April 1997;  CHEMICAL ABSTRACTS, vol. 125, no. 2, 8 July 1996 Columbus, Ohio, US; abstract no. 15128, ISHIZAWA, MAKI ET AL: "Portable fuel cell system for telecommunications use" XP000666114&DENKI KAGAKU OYOBI KOGYO BUTSURI KAGAKU (1996), 64(6), 454-459 CODEN: DKOKAZ;ISSN: 0366-9297,1996,;  PATENT ABSTRACTS OF JAPAN vol. 097, no. 010, 31 October 1997&JP 09 171842 A (SANYO ELECTRIC CO LTD;NIPPON TELEGR&TELEPH CORP NTT), 30 June 1997;  PATENT ABSTRACTS OF JAPAN vol. 096, no. 009, 30 September 1996 -&JP 08 131382 A (MATSUSHITA ELECTRIC IND CO LTD), 28 May 1996US6080500-A  Chemical Abstracts, vol. 125, No. 2, Jul. 8, 1996, abstract No. 15128, Ishizawa, Maki et al.: "Portable Fuel Cell System for Telecomminications Use" XP000666114.;  Galen R. Frysinger: "The Economical Fuel Cell" I.E.E.E. Spectrum, vol. 6, No. 3, Mar. 1969, pp. 83-90 XP-002090617.;  Ishizawa M. et al.: "Portable Fuel-Cell Systems" NTT Review, vol. 9, No. 5, Sep. 1997, pp. 65-69 XP-000704773.EP911895-B1  CHEMICAL ABSTRACTS, vol. 125, no. 2, 8 July 1996 Columbus, Ohio, US; abstract no. 15128, ISHIZAWA, MAKI ET AL: "Portable fuel cell system for telecommunications use" XP000666114 & DENKI KAGAKU OYOBI KOGYO BUTSURI KAGAKU (1996), 64(6), 454-459 CODEN: DKOKAZ;ISSN: 0366-9297,1996,;  GALEN R. FRYSINGER: "The economical fuel cell" I.E.E.E. SPECTRUM, vol. 6, no. 3, March 1969, pages 83-90, XP002090617;  ISHIZAWA M ET AL: "PORTABLE FUEL-CELL SYSTEMS" NTT REVIEW, vol. 9, no. 5, September 1997, pages 65-69, XP000704773;  PATENT ABSTRACTS OF JAPAN vol. 096, no. 009, 30 September 1996 -& JP 08 131382 A (MATSUSHITA ELECTRIC IND CO LTD), 28 May 1996;  PATENT ABSTRACTS OF JAPAN vol. 097, no. 008, 29 August 1997 -& JP 09 092318 A (NIPPON TELEGR &AMP;TELEPH CORP &LT;NTT&GT;), 4 April 1997;  PATENT ABSTRACTS OF JAPAN vol. 097, no. 010, 31 October 1997 & JP 09 171842 A (SANYO ELECTRIC CO LTD;NIPPON TELEGR &AMP; TELEPH CORP &LT;NTT&GT;), 30 June 1997