ICOHTEC NEWSLETTER No 156, April 2018 www.icohtec.org ELECTROPHOTOGRAPHY by Chester F. Carlson, Jackson Heights, N. Y. Patent filed April 4, 1939. Patented October 6, 1942 UNITED STATES PATENT OFFICE 2,297,691.

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Date: 2018-05-14 02:24:35		ICOHTEC NEWSLETTER No 156, April 2018 www.icohtec.org ELECTROPHOTOGRAPHY by Chester F. Carlson, Jackson Heights, N. Y. Patent filed April 4, 1939. Patented October 6, 1942 UNITED STATES PATENT OFFICE 2,297,691. Add to Reading List Source URL: www.icohtec.org Download Document from Source Website File Size: 989,98 KB Share Document on Facebook