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Laser beam levelling device
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Patent number 5,148,018
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Issue date Sep 15, 1992
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Ammann Lasertechnik AG
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Hans-Rudolf Ammann
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G01 - MEASURING TESTING
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Flexible level
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Patent number 4,759,134
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Issue date Jul 26, 1988
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Barney D. Chrisley
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G01 - MEASURING TESTING
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Level
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Patent number 4,610,094
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Issue date Sep 9, 1986
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George Robson
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G01 - MEASURING TESTING
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Level indicator
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Patent number 4,434,561
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Issue date Mar 6, 1984
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Michael E. Gaspar
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G01 - MEASURING TESTING
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Two-fluid tiltmeter
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Patent number 4,087,920
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Issue date May 9, 1978
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The United States of America as represented by the Secretary of the Interior
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George R. Huggett
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G01 - MEASURING TESTING
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Tilt detector and system
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Patent number 4,044,473
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Issue date Aug 30, 1977
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Hydril Company
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Geoffrey J. Crask
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E21 - EARTH DRILLING MINING
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Automatic blade angle controller system
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Patent number 4,024,823
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Issue date May 24, 1977
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The United States of America as represented by the Secretary of the Navy
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Carter J. Ward
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Inclinometer
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Patent number 3,984,918
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Issue date Oct 12, 1976
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Sun Oil Company (Delaware)
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Preston E. Chaney
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E21 - EARTH DRILLING MINING
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3911592
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Patent number 3,911,592
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Issue date Oct 14, 1975
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E21 - EARTH DRILLING MINING
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3849897
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Patent number 3,849,897
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Issue date Nov 26, 1974
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G01 - MEASURING TESTING
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3842512
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Patent number 3,842,512
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Issue date Oct 22, 1974
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G01 - MEASURING TESTING
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3817625
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Patent number 3,817,625
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Issue date Jun 18, 1974
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G01 - MEASURING TESTING
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3699661
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Patent number 3,699,661
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Issue date Oct 24, 1972
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G01 - MEASURING TESTING
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3698094
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Patent number 3,698,094
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Issue date Oct 17, 1972
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G01 - MEASURING TESTING
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3645135
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Patent number 3,645,135
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Issue date Feb 29, 1972
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G01 - MEASURING TESTING
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3621583
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Patent number 3,621,583
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Issue date Nov 23, 1971
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G01 - MEASURING TESTING
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3577645
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Patent number 3,577,645
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Issue date May 4, 1971
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G01 - MEASURING TESTING
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3483624
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Patent number 3,483,624
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Issue date Dec 16, 1969
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G01 - MEASURING TESTING
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3443319
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Patent number 3,443,319
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Issue date May 13, 1969
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G01 - MEASURING TESTING
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3310880
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Patent number 3,310,880
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Issue date Mar 28, 1967
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G01 - MEASURING TESTING
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3236535
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Patent number 3,236,535
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Issue date Feb 22, 1966
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B66 - HOISTING LIFTING HAULING
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3159925
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Patent number 3,159,925
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Issue date Dec 8, 1964
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G01 - MEASURING TESTING
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3018558
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Patent number 3,018,558
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Issue date Jan 30, 1962
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G01 - MEASURING TESTING