Allan T. Fisk

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Salem, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Drag bit excavation
- Patent number 4,087,131
- Issue date May 2, 1978
- Rapidex, Inc.
- Carl R. Peterson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Sealing between relatively rotating members in boring apparatus
- Patent number 4,020,910
- Issue date May 3, 1977
- Rapidex, Inc.
- Carl R. Peterson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Boring apparatus
- Patent number 3,977,481
- Issue date Aug 31, 1976
- Rapidex, Inc.
- Allan T. Fisk
- E21 - EARTH DRILLING MINING