Inventor · disambiguated record
J. Calvin Elder
Also filed as: ELDER J CALVIN
3 granted patents·32 citations·filing 1975–1980
69Inventor score
Technology areasB61L
Top patents by PatentIndex Score
3 records- 0155US4066228ARoute control system for railroad interlockingsWESTINGHOUSE AIR BRAKE CO·Filed 1976·Granted Jan 3, 1978·15 cites·11 claims
- 0244US4323210AManual block traffic control and signaling system for railroadsAMERICAN STANDARD INC·Filed 1980·Granted Apr 6, 1982·11 cites·6 claims
- 0335US3937428ARoute interlocking control systemWESTINGHOUSE AIR BRAKE CO·Filed 1975·Granted Feb 10, 1976·6 cites·14 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →