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Patent applications and USPTO patent grants for Coldren; Chester P..The latest application filed is for "tension indicating and lock cone washer".
Patent | Date |
---|---|
Tension indicating and lock cone washer Grant 4,347,024 - Coldren August 31, 1 | 1982-08-31 |
Tension indicator Grant 4,047,463 - Coldren September 13, 1 | 1977-09-13 |
Tamper resistant nut Grant D245,067 - Coldren July 19, 1 | 1977-07-19 |
Mine bolt tension indicator Grant 4,000,681 - Coldren January 4, 1 | 1977-01-04 |
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