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I haven't checked the Japanese and European patents, but the US 4,794,455 was filed on March 21, 1988 and granted on December 27, 1988, so it expired in March 21, 2008. Looks like H.261 might be patent free in the US. Jrincayc (talk) 03:22, 24 June 2008 (UTC)[reply]
Also, in the database Sony Corporation, Bellcore, AT&T Corp., Nortel Networks Limited, Vistacom Industries, Inc., Graphics Communication Technologies, Ltd., Nippon Telegraph and Telephone Corporation, KDDI Corporation, Alcatel, Compression Labs, Inc., Toshiba Corporation, AEG Aktiengesellschaft, British Telecommunications plc, Philips Kommunikations Industrie AG, Royal PTT Nederland N. V., Sharp Corporation, GPT Data Systems, A GEC Plessey Telecommunications Division, Société Anonyme de Télécommunications, Philips Electronics N.V., Oki Electric Industry Co., Ltd., Centro Studi e Laboratori Telecommunicazioni SPA, Matsushita Communication Industrial Co., Ltd., Mitsubishi Electric Corp., Fujitsu Ltd., NEC CORPORATION, France Telecom/France Telecom Research and Development Center, Electronics and Telecommunications Research Institute. are listed as having no patents. Jrincayc (talk) 22:49, 4 July 2008 (UTC)[reply]
