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Patent applications and USPTO patent grants for Kelly, Jr.; Joseph L..The latest application filed is for "dual metal face seal with single recessed energizer".
Patent | Date |
---|---|
Dual metal face seal with single recessed energizer Grant 5,360,076 - Kelly, Jr. , et al. November 1, 1 | 1994-11-01 |
Volume and pressure balanced rigid face seal for rock bits Grant 4,753,304 - Kelly, Jr. June 28, 1 | 1988-06-28 |
Surface acoustic wave pipe identification system Grant 4,698,631 - Kelly, Jr. , et al. October 6, 1 | 1987-10-06 |
Solid head bit with tungsten carbide central core Grant 4,574,895 - Dolezal , et al. March 11, 1 | 1986-03-11 |
Air groove scraper Grant 4,515,228 - Dolezal , et al. May 7, 1 | 1985-05-07 |
Rotary Shaft Drilling Apparatus Grant 3,695,363 - Kelly, Jr. October 3, 1 | 1972-10-03 |
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