Inventor · disambiguated record
John H. Spence
Also filed as: SPENCE JOHN H
3 granted patents·63 citations·filing 1976–1984
72Inventor score
Top patents by PatentIndex Score
3 records- 0175US4082045AStability bracing for twist on high gondolas or hopper carsPULLMAN INC·Filed 1976·Granted Apr 4, 1978·30 cites·5 claims
- 0272US4630547ACross bearer arrangement for slotted center sillPULLMAN STANDARD INC·Filed 1984·Granted Dec 23, 1986·26 cites·14 claims
- 0339US4206710ARailway car center plate filler arrangementPULLMAN INC·Filed 1978·Granted Jun 10, 1980·7 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →