Patent Development, Ltd.

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Knoxville, TN, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and machine for removing blockage and silt from abandoned au...
- Patent number 4,568,126
- Issue date Feb 4, 1986
- Patent Development, Ltd.
- Leonard R. Nitzberg
- B08 - CLEANING
Information Patent Grant
Method for remote positioning of explosive charges in mining voids
- Patent number 4,438,699
- Issue date Mar 27, 1984
- Patent Development Ltd.
- Leonard R. Nitzberg
- F42 - AMMUNITION BLASTING
Information Patent Grant
Machine and method for mining hard material in-situ between adjacen...
- Patent number 4,205,881
- Issue date Jun 3, 1980
- Patent Development, Ltd.
- Leonard R. Nitzberg
- E21 - EARTH DRILLING MINING

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