Development Finance Corporation

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4878664 Poker pool gameExpiredOct 24, 84Nov 07, 89[A63D]
4771245 Earth testing means for an electric fence networkExpiredSep 10, 86Sep 13, 88[G01R]
4695101 Pressure regulatorExpiredMar 11, 86Sep 22, 87[B60T]
4672719 Upholstery buttonExpiredMar 19, 86Jun 16, 87[A44B]
4651023 Electronic switchExpiredMay 29, 85Mar 17, 87[H03F]
4576247 Locking memberExpiredSep 22, 83Mar 18, 86[F01N]
4543687 Tapered nesting hingeExpiredAug 15, 83Oct 01, 85[E05D]
4480036 Proteolytic enzymeExpiredAug 08, 80Oct 30, 84[C12N]
4473646 Stereospecific asparaginasesExpiredApr 10, 81Sep 25, 84[C12N]
4450762 Onion peeling meansExpiredJun 04, 82May 29, 84[A23N]
4275671 Seed sowing implementsExpiredApr 14, 80Jun 30, 81[A01C]

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