Inventor · disambiguated record
William F. Langman
Also filed as: LANGMAN WILLIAM F
4 granted patents·22 citations·filing 1980–1985
73Inventor score
Technology areasE01B
Files withOMARK INDUSTRIES INC4
Top patents by PatentIndex Score
4 records- 0134US4629118ARail insulating pad assemblyOMARK INDUSTRIES INC·Filed 1983·Granted Dec 16, 1986·7 cites·8 claims
- 0232US4417690ASteel railroad sleeperOMARK INDUSTRIES INC·Filed 1980·Granted Nov 29, 1983·6 cites·8 claims
- 0327US4424935ASpring rail fastenerOMARK INDUSTRIES INC·Filed 1980·Granted Jan 10, 1984·4 cites·8 claims
- 0424US4778106AStud, arc shield and rail clip for securing railroad railsOMARK INDUSTRIES INC·Filed 1985·Granted Oct 18, 1988·5 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →