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Asphalt production
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Patent number 4,276,093
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Issue date Jun 30, 1981
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Otto Pickermann
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3904428
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Patent number 3,904,428
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Issue date Sep 9, 1975
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3894724
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Patent number 3,894,724
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Issue date Jul 15, 1975
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3812821
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Patent number 3,812,821
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Issue date May 28, 1974
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3802582
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Patent number 3,802,582
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Issue date Apr 9, 1974
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3737149
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Patent number 3,737,149
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Issue date Jun 5, 1973
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3418900
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Patent number 3,418,900
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Issue date Dec 31, 1968
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3021566
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Patent number 3,021,566
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Issue date Feb 20, 1962
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2969961
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Patent number 2,969,961
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Issue date Jan 31, 1961
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2793139
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Patent number 2,793,139
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Issue date May 21, 1957
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2429701
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Patent number 2,429,701
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Issue date Oct 28, 1947
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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2043037
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Patent number 2,043,037
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Issue date Jun 2, 1936
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1649816
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Patent number 1,649,816
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Issue date Nov 22, 1927
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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1448370
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Patent number 1,448,370
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Issue date Mar 13, 1923
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES