G. Robert Frey

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Franklin, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Free floating operator compartment
- Patent number 4,556,117
- Issue date Dec 3, 1985
- Joy Manufacturing Company
- G. Robert Frey
- E21 - EARTH DRILLING MINING
Information Patent Grant
Suspension system for operator compartment
- Patent number 4,365,682
- Issue date Dec 28, 1982
- Joy Manufacturing Company
- G. Robert Frey
- E21 - EARTH DRILLING MINING
Information Patent Grant
Automatic roof bolting system for mines
- Patent number 4,229,124
- Issue date Oct 21, 1980
- Joy Manufacturing Company
- G. Robert Frey
- E21 - EARTH DRILLING MINING
Information Patent Grant
Protective canopy
- Patent number 3,937,517
- Issue date Feb 10, 1976
- Joy Manufacturing Company
- William J. Donovan
- B60 - VEHICLES IN GENERAL