WO200222234-A2  DATABASE WPI Week 197934 Derwent Publications Ltd., London, GB; AN 1979-62212B XP002231115 & JP 54 087677 A (KANKYO KAGAKU KENKY), 12 July 1979 (1979-07-12);  PATENT ABSTRACTS OF JAPAN vol. 1998, no. 4, 31 March 1998 (1998-03-31) & JP 09 308813 A (LASER MATSUSHITA KK), 2 December 1997 (1997-12-02);  PATENT ABSTRACTS OF JAPAN vol. 1998, no. 4, 31 March 1998 (1998-03-31)&JP 09 308813 A (LASER MATSUSHITA KK), 2 December 1997 (1997-12-02);  DATABASE WPI Week 197934 Derwent Publications Ltd., London, GB; AN 1979-62212B XP002231115&JP 54 087677 A (KANKYO KAGAKU KENKY), 12 July 1979 (1979-07-12)US6432177-B1  Moore, J. et al., The effects of battlefield contaminants on PEMFC performance, Jour. of Power Sources, vol. 85, pp. 254-260 (2000).;  Sakamoto, S. et al., "Study of the Factors Affecting PEFC Life Characteristic", Ecology and Energy Systems Research Center, Sanyo Electric Co., Ltd., pp. 141-144 (Date unknown).US6638339-B2  Moore, J. et al., "The effects of battlefield contaminants on PEMFC performance", Journal of Power Sources, vol. 85, pp. 254-260 (2000).;  Sakamoto, S. et al., "Study of the Factors Affecting PEFC Life Characteristic", Ecology and Energy Systems Research Center, Sanyo Electric Co., Ltd., Tochigi 326-8534, Japan, pp. 141-144 (date unknown).;  Stenersen et al., U.S. Patent Application Publication US 2002/0150805 A1, Oct. 17, 2002, Filter Assembly for Intake Air of Fuel Cell.*US7101419-B2  Moore, J. et al., "The effects of battlefield contaminants on PEMFC performance", Journal of Power Sources, vol. 85, pp. 254-260 (2000).;  Sakamoto, S. et al., "Study of the Factors Affecting PEFC Life Characteristic", Ecology and Energy Systems Research Center, SANYO Electric Co., Ltd., Tochigi 326-8534, Japan, pp. 141-144, date unknown.EP1349638-B1  PATENT ABSTRACTS OF JAPAN vol. 1998, no. 4, 31 March 1998 (1998-03-31)&JP 09 308813 A (LASER MATSUSHITA KK), 2 December 1997 (1997-12-02);  DATABASE WPI Week 197934 Derwent Publications Ltd., London, GB; AN 1979-62212B XP002231115&JP 54 087677 A (KANKYO KAGAKU KENKY), 12 July 1979 (1979-07-12)US7758674-B2  Moore, J. et al., "The effects of battlefield contaminants on PEMFC performance", Journal of Power Sources, vol. 85, pp. 254-260 (2000).;  Sakamoto, S. et al., "Study of the Factors Affecting PEFC Life Characteristic", Ecology and Energy Systems Research Center, Sanyo Electric Co.. Ltd., Tochigi 326-8534, Japan, pp. 141-144 (date unknown).;  Fue~ber, Rolf , et al., "Air Intake and Exhaust Systems in Fuel Cell Engines", Society of Automotive Engineers, Inc., SAE The Engineering Society for Advancing Mobility Land Sea Air and Space International,(2000), 7 pages.