Inventor · disambiguated record
Percy R. Helm
Also filed as: HELM PERCY R
5 granted patents·125 citations·filing 1974–1982
83Inventor score
Files withMANITOWOC CO5
Top patents by PatentIndex Score
5 records- 0183US3977530ACrane with gantry backhitch and boom hoist assembly removable as a unitMANITOWOC CO·Filed 1974·Granted Aug 31, 1976·35 cites·3 claims
- 0275US4601402ASteerable concentric ring segment supported lift craneMANITOWOC CO·Filed 1981·Granted Jul 22, 1986·25 cites·5 claims
- 0373US4358021ASeparated ring segment dual pivot lift craneMANITOWOC CO·Filed 1980·Granted Nov 9, 1982·26 cites·5 claims
- 0473US4316548AConcentric ring segment supported lift craneMANITOWOC CO·Filed 1980·Granted Feb 23, 1982·23 cites·5 claims
- 0563US4449635AImaginary pivot lift craneMANITOWOC CO·Filed 1982·Granted May 22, 1984·16 cites·5 claims
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