J. Hengstler K.G.

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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Expired/Abandoned/Withdrawn Patents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
4564043 Stepping valveExpiredJul 03, 84Jan 14, 86[F15B]
4506373 Resettable mechanical counterExpiredJan 24, 83Mar 19, 85[G06M]
4425014 Housing for data entry equipmentExpiredJul 20, 81Jan 10, 84[A47B]
4417138 Credit card, process and marking appliance for manufacturing said credit card, and marking appliance for marking said credit card in order to effect deductions from a credit represented by the cardExpiredMar 26, 82Nov 22, 83[G06K]
4284881 Digit wheel counterExpiredDec 26, 79Aug 18, 81[G06M]
4277677 Mechanical counterExpiredJun 18, 79Jul 07, 81[G06C, G06F]
4268743 Counting-down counterExpiredJun 18, 79May 19, 81[G06C, G06F]
4258374 Electrically operated device for marking metal-coated paperExpiredSep 27, 79Mar 24, 81[G01D]
4196985 Frame-counting device for use with film cassetteExpiredJun 05, 78Apr 08, 80[G03B]

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