Collar or other support gripped to one or both parts by toggle-action, cam, or other member pivoted or similarly mounted

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Patents Grantslast 30 patents

Information Patent Grant
Yieldable prop having a restraint arrangement
- Patent number 7,445,408
- Issue date Nov 4, 2008
- Jennmar Corporation
- John C. Stankus
- E21 - EARTH DRILLING MINING
Information Patent Grant
Yieldable prop having a yield section
- Patent number 7,390,147
- Issue date Jun 24, 2008
- Jennmar Corporation
- John C. Stankus
- E21 - EARTH DRILLING MINING
Information Patent Grant
Yieldable prop having a yield section
- Patent number 7,134,810
- Issue date Nov 14, 2006
- Jennmar Corporation
- John C. Stankus
- E21 - EARTH DRILLING MINING
Information Patent Grant
2892647
- Patent number 2,892,647
- Issue date Jun 30, 1959
- E04 - BUILDING
Information Patent Grant
2747828
- Patent number 2,747,828
- Issue date May 29, 1956
- E21 - EARTH DRILLING MINING
Information Patent Grant
2623723
- Patent number 2,623,723
- Issue date Dec 30, 1952
- E21 - EARTH DRILLING MINING
Information Patent Grant
2514965
- Patent number 2,514,965
- Issue date Jul 11, 1950
- E21 - EARTH DRILLING MINING
Information Patent Grant
2445543
- Patent number 2,445,543
- Issue date Jul 20, 1948
- E21 - EARTH DRILLING MINING
Information Patent Grant
2256620
- Patent number 2,256,620
- Issue date Sep 23, 1941
- E04 - BUILDING
Information Patent Grant
2250836
- Patent number 2,250,836
- Issue date Jul 29, 1941
- E21 - EARTH DRILLING MINING