Inventor · disambiguated record

Charles A. Erdman

Also filed as: ERDMAN CHARLES A

2 granted patents·12 citations·filing 1975–1976

56Inventor score

Technology areasB43K G01D

Files withGRAPHIC CONTROLS CORP2

Top patents by PatentIndex Score

2 records

0146US4017870ATruncated ball penGRAPHIC CONTROLS CORP·Filed 1976·Granted Apr 12, 1977·9 cites·10 claims
0239US3983569AInstrument pen with integral pen arm attachment meansGRAPHIC CONTROLS CORP·Filed 1975·Granted Sep 28, 1976·3 cites·12 claims

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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →