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Chain saw
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Bror E. Osterman
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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3778112
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3604755
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Patent number 3,604,755
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Issue date Sep 14, 1971
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E21 - EARTH DRILLING MINING
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3580639
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Patent number 3,580,639
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Issue date May 25, 1971
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E21 - EARTH DRILLING MINING
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3550962
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Patent number 3,550,962
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Issue date Dec 29, 1970
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E21 - EARTH DRILLING MINING
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3463026
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Patent number 3,463,026
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E21 - EARTH DRILLING MINING
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3436122
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Patent number 3,436,122
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Issue date Apr 1, 1969
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E21 - EARTH DRILLING MINING
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3384417
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Patent number 3,384,417
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Issue date May 21, 1968
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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3378308
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Patent number 3,378,308
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Issue date Apr 16, 1968
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E21 - EARTH DRILLING MINING
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2956442
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Patent number 2,956,442
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Issue date Oct 18, 1960
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E21 - EARTH DRILLING MINING
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2877006
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Patent number 2,877,006
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E21 - EARTH DRILLING MINING
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2851261
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Patent number 2,851,261
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E21 - EARTH DRILLING MINING
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2822699
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Patent number 2,822,699
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Issue date Feb 11, 1958
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E21 - EARTH DRILLING MINING
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2810568
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Patent number 2,810,568
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E21 - EARTH DRILLING MINING
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2766979
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Patent number 2,766,979
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E21 - EARTH DRILLING MINING
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2661940
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E21 - EARTH DRILLING MINING
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2653808
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Patent number 2,653,808
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E21 - EARTH DRILLING MINING
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2601978
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Patent number 2,601,978
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E21 - EARTH DRILLING MINING
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2487232
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Patent number 2,487,232
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E21 - EARTH DRILLING MINING
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2400230
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E21 - EARTH DRILLING MINING
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2398107
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Patent number 2,398,107
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E21 - EARTH DRILLING MINING
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2344750
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Patent number 2,344,750
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E21 - EARTH DRILLING MINING
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2325792
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Patent number 2,325,792
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2324033
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E21 - EARTH DRILLING MINING
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2251406
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E21 - EARTH DRILLING MINING
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2246225
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E21 - EARTH DRILLING MINING
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2189669
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E21 - EARTH DRILLING MINING
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2139410
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Issue date Dec 6, 1938
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E21 - EARTH DRILLING MINING