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
Join the waitlist — get patent alerts
Get an alert when Percy R. Helm files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →