Image:Patent 3,988,855lowRes.jpg

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Crabtree; Alfred A. (San Ramon, CA), Prodger; Brian S. (Barrington, RI), O'Connor; Hubert P. (Warwick, RI) May 1, 1975

http://patimg2.uspto.gov/.DImg?Docid=US003988855&PageNum=2&IDKey=03B1E144AFC2&ImgFormat=tif

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current01:14, 24 January 20071,138×894 (395 KB)Hholland (Talk | contribs) (Crabtree; Alfred A. (San Ramon, CA), Prodger; Brian S. (Barrington, RI), O'Connor; Hubert P. (Warwick, RI) May 1, 1975 http://patimg2.uspto.gov/.piw?docid=US003988855&SectionNum=2&IDKey=03B1FD58AFC2&HomeUrl=http://patft.uspto.gov/netacgi/nph-Parser?Sect)

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