Inventor · disambiguated record
Charles A. Speas
Also filed as: SPEAS CHARLES A
3 granted patents·44 citations·filing 1977–1978
72Inventor score
Technology areasB29C
Files withHEDWIN CORP3
Top patents by PatentIndex Score
3 records- 0151US4207284AMethod of making plastic drum assemblies with preformed insertsHEDWIN CORP·Filed 1977·Granted Jun 10, 1980·16 cites·17 claims
- 0248US4264016APlastic drums and drum assemblies with preformed insertsHEDWIN CORP·Filed 1978·Granted Apr 28, 1981·14 cites·16 claims
- 0348US4209104ADrum assemblies with preformed insertsHEDWIN CORP·Filed 1978·Granted Jun 24, 1980·14 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →