Play-Rite Music Rolls, Inc.

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Turlock, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Music roll perforating process and apparatus
- Patent number 4,143,807
- Issue date Mar 13, 1979
- Play-Rite Music Rolls, Inc.
- Mogens Ravn
- G06 - COMPUTING CALCULATING COUNTING