Hoffco, Inc.

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Patent Activity in the Last 10 Years

Technologies

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Top Patents (by citation)

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
D704941 BenchMar 14, 13May 20, 14[0601]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6155940 Adjustable cam weights for torque converterExpiredApr 08, 99Dec 05, 00[F16H]
6006434 Quick-release component connector for lawn toolExpiredSep 30, 97Dec 28, 99[A01D]
5647810 Drive arm-engaging roller for centrifugal clutchExpiredSep 08, 95Jul 15, 97[F16H]
5597060 Centrifugal actuator for centrifugal clutchExpiredOct 14, 94Jan 28, 97[F16D, F16H]
5437356 Centrifugal clutchExpiredOct 18, 93Aug 01, 95[F16D]
5427217 Steering clutch brake assemblyExpiredJul 08, 93Jun 27, 95[B62D, F16D, A01D]
5419421 Quiet-running centrifugal clutchExpiredJul 27, 93May 30, 95[F16D]
5411122 Cone ramp clutchExpiredMay 24, 93May 02, 95[F16D]
5377774 Variable speed drive systemExpiredFeb 04, 93Jan 03, 95[B62D]
5246403 Pivoting belt tensioning deviceExpiredNov 04, 91Sep 21, 93[F16H]
5048616 Garden tiller tine assemblyExpiredMar 05, 90Sep 17, 91[A01B]
4633978 Brake caliper includes mechanical actuator with camming device and manual wear compensatorExpiredJul 22, 85Jan 06, 87[F16D]
4428184 Safety mounting for lawn mower bladeExpiredApr 01, 82Jan 31, 84[A01D]
4416107 Lawn mower blade control mechanismExpiredApr 16, 82Nov 22, 83[A01D]
4413468 Lawn mower blade retainerExpiredApr 02, 82Nov 08, 83[A01D]
4335585 Lawn trimmer constructionExpiredJan 07, 80Jun 22, 82[F16C, A01D]
4326368 Clutch and brake for rotary lawn mowerExpiredJun 12, 80Apr 27, 82[A01D]
4316355 Combined flywheel and clutch mechanism for lawn mower bladeExpiredJan 24, 80Feb 23, 82[A01D]
4297829 Lawn mower blade rotation warning deviceExpiredOct 10, 80Nov 03, 81[A01D]
4277936 Combined flywheel and clutch driver, and control and warning deviceExpiredAug 13, 79Jul 14, 81[A01D]

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