Donald S. Christopher

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Willowick, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Reversing ratchet door closer
- Patent number 4,371,201
- Issue date Feb 1, 1983
- Stock Equipment Company
- Arthur J. Stock
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Weight-sensor calibration for gravimetric coal feeder
- Patent number 4,353,427
- Issue date Oct 12, 1982
- Stock Equipment Company
- Arthur J. Stock
- G01 - MEASURING TESTING