Ing. Alfred Schmidt GmbH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
D310531 Snow-cutting machineExpiredDec 23, 87Sep 11, 90[]
4912798 Sweeper cylinder on a streetcleaning vehicleExpiredDec 02, 88Apr 03, 90[E01H]
4843744 SnowplowExpiredOct 29, 87Jul 04, 89[E01H]
4829684 Rotary snow plow with feeding mechanismsExpiredNov 10, 87May 16, 89[E01H]
4796327 Apparatus for picking up dog excrementExpiredSep 23, 87Jan 10, 89[E01H]
4760657 Snow sweeping method and apparatusExpiredJul 28, 86Aug 02, 88[E01H]
4715134 Rotary snow ploughExpiredJan 24, 85Dec 29, 87[E01H]
4631910 Mower, especially for grass at airportsExpiredDec 13, 84Dec 30, 86[A01D]
4632200 Drive system on a carrier vehicle for various implements attached on the front or rearExpiredDec 13, 84Dec 30, 86[B60K]
4592156 SnowblowerExpiredJun 24, 85Jun 03, 86[E01H]
4414699 Mechanical sweeper for attachment to a carrier vehicleExpiredSep 11, 81Nov 15, 83[E01H]
4395794 Device to take up refuse by vacuum intake airExpiredMay 08, 80Aug 02, 83[A47L]
4354320 Snow plow for railed vehicleExpiredSep 29, 80Oct 19, 82[E01H]
4237629 Apparatus for actuating the operation of a snowplowExpiredAug 04, 78Dec 09, 80[E01H, H01H]

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