Assignee
VITAL CHAIN BLOCK MFG
JP·21 granted patents·315 citations·filing 1980–2001
Top patents by PatentIndex Score
21 records- 0173US6352243B1Chain hoist with overload prevent deviceVITAL CHAIN BLOCK MFG·Filed 2000·Granted Mar 5, 2002·21 cites·2 claims
- 0272US6517054B2Lever hoist with overload preventing deviceVITAL CHAIN BLOCK MFG·Filed 2001·Granted Feb 11, 2003·20 cites·1 claims
- 0368US4768754AManual hoist with overload preventerVITAL CHAIN BLOCK MFG·Filed 1987·Granted Sep 6, 1988·24 cites·7 claims
- 0467US4343240ATrolleyVITAL CHAIN BLOCK MFG·Filed 1980·Granted Aug 10, 1982·29 cites·6 claims
- 0564US5007617AHand-operated chain blockVITAL CHAIN BLOCK MFG·Filed 1989·Granted Apr 16, 1991·21 cites·4 claims
- 0661US5125629AHand-operated chain blockVITAL CHAIN BLOCK MFG·Filed 1990·Granted Jun 30, 1992·22 cites·5 claims
- 0761US5088694ALever type hoistVITAL CHAIN BLOCK MFG·Filed 1991·Granted Feb 18, 1992·21 cites·8 claims
- 0861US4664357AOverload avoiding arrangement for a hoistVITAL CHAIN BLOCK MFG·Filed 1985·Granted May 12, 1987·21 cites·4 claims
- 0958US6578824B2Overload-preventing device for winchVITAL CHAIN BLOCK MFG·Filed 2001·Granted Jun 17, 2003·9 cites·4 claims
- 1057US5238226ALever operated hoistVITAL CHAIN BLOCK MFG·Filed 1991·Granted Aug 24, 1993·19 cites·7 claims
- 1155US4438905ADevice for mounting and dismounting chain blocksVITAL CHAIN BLOCK MFG·Filed 1981·Granted Mar 27, 1984·13 cites·9 claims
- 1254US5156377ALever-operated hoistVITAL CHAIN BLOCK MFG·Filed 1990·Granted Oct 20, 1992·17 cites·4 claims
- 1351USD407175SLever blockVITAL CHAIN BLOCK MFG·Filed 1997·Granted Mar 23, 1999·7 cites·1 claims
- 1448US4420144AManual hoisting and pulling apparatusVITAL CHAIN BLOCK MFG·Filed 1981·Granted Dec 13, 1983·10 cites·6 claims
- 1546US4881720AHand operated chain blockVITAL CHAIN BLOCK MFG·Filed 1988·Granted Nov 21, 1989·10 cites·3 claims
- 1644US5769398ALever hoistVITAL CHAIN BLOCK MFG·Filed 1997·Granted Jun 23, 1998·13 cites·4 claims
- 1742US5535988ALever type hoist having reverse rotation preventive mechanismVITAL CHAIN BLOCK MFG·Filed 1994·Granted Jul 16, 1996·9 cites·14 claims
- 1840US6059267ALever hoistVITAL CHAIN BLOCK MFG·Filed 1998·Granted May 9, 2000·8 cites·3 claims
- 1940US5149058ALever-operated hoistVITAL CHAIN BLOCK MFG·Filed 1990·Granted Sep 22, 1992·8 cites·6 claims
- 2040US4948098AChain hoistVITAL CHAIN BLOCK MFG·Filed 1990·Granted Aug 14, 1990·8 cites·2 claims
- 2135US4819913ALever type hoisting machineVITAL CHAIN BLOCK MFG·Filed 1987·Granted Apr 11, 1989·5 cites·8 claims
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