Robert A. Sewell

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Rockford, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Cam adjustment for tension spring of sewing machine head lifter mec...
- Patent number 4,018,487
- Issue date Apr 19, 1977
- Keystone Consolidated Industries, Inc.
- John L. Orr
- D05 - SEWING EMBROIDERING TUFTING