Assignee
CALKINS MANUFACTURING COMPANY
US·8 granted patents·159 citations·filing 1975–1995
Top patents by PatentIndex Score
8 records- 0183US5154240AFolding implement frameCALKINS MANUFACTURING COMPANY·Filed 1991·Granted Oct 13, 1992·47 cites·10 claims
- 0279US3993324ABoat trailerCALKINS MANUFACTURING COMPANY·Filed 1975·Granted Nov 23, 1976·34 cites·5 claims
- 0362US4011958ABoat trailerCALKINS MANUFACTURING COMPANY·Filed 1975·Granted Mar 15, 1977·20 cites·7 claims
- 0449US4664401ABoat trailerCALKINS MANUFACTURING COMPANY·Filed 1985·Granted May 12, 1987·18 cites·8 claims
- 0543US4391334AHitch assemblyCALKINS MANUFACTURING COMPANY·Filed 1981·Granted Jul 5, 1983·8 cites·20 claims
- 0641US4408777AHitch mechanismCALKINS MANUFACTURING COMPANY·Filed 1981·Granted Oct 11, 1983·7 cites·28 claims
- 0740US5255933AWeight distributing hull and keel support for boat trailer framesCALKINS MANUFACTURING COMPANY·Filed 1992·Granted Oct 26, 1993·18 cites·26 claims
- 0826US5634761AWeight distributing hull and keel support for boat trailer framesCALKINS MANUFACTURING COMPANY·Filed 1995·Granted Jun 3, 1997·7 cites·20 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →