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Masterson Engineering Inc.
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St. Louis Park, MN, US
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Patents Grants
last 30 patents
Information
Patent Grant
Phonograph
Patent number
D265085
Issue date
Jun 22, 1982
Masterson Engineering Inc.
Earl E. Masterson
D14 - Recording, communication, or information retrieval equipment
Information
Patent Grant
Phonograph tone arm control system
Patent number
4,254,959
Issue date
Mar 10, 1981
Masterson Engineering Inc.
Earl E. Masterson
G11 - INFORMATION STORAGE
Information
Patent Grant
Phonograph tone arm system
Patent number
4,239,239
Issue date
Dec 16, 1980
Masterson Engineering Inc.
Earl E. Masterson
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
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