Assignee
HAMMERBLOW CORP
US·4 granted patents·133 citations·filing 1977–1998
Top patents by PatentIndex Score
4 records- 0184US6234509B1Spring return couplerHAMMERBLOW CORP·Filed 1998·Granted May 22, 2001·60 cites·22 claims
- 0273US4133553ASelf-closing trailer couplerHAMMERBLOW CORP·Filed 1977·Granted Jan 9, 1979·22 cites·8 claims
- 0369US5382109ACoupling deviceHAMMERBLOW CORP·Filed 1992·Granted Jan 17, 1995·36 cites·10 claims
- 0455US4157190ACoupler with operable handleHAMMERBLOW CORP·Filed 1977·Granted Jun 5, 1979·15 cites·10 claims
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