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Preston V. Murphy

LA Lectret S. A.: 1 patents #1 of 2Top 50%
📍 Geneva, CH: #9 of 51 inventorsTop 20%
Overall (1982): #38,039 of 81,411Top 50%
1
Patents 1982

Issued Patents 1982

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4331840 Electret transducer with tapered acoustic chamber Kurt Hubschi 1982-05-25