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Thomas J. Landsberg
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Princeton, NJ, US
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last 30 patents
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Patent Grant
Friction rock stabilizer
Patent number
5,192,169
Issue date
Mar 9, 1993
Simmons-Rand Company
Thomas J. Landsberg
E21 - EARTH DRILLING MINING
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Patent Grant
Open seam friction rock stabilizer
Patent number
5,192,146
Issue date
Mar 9, 1993
Simmons-Rand Company
Thomas J. Landsberg
E21 - EARTH DRILLING MINING