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1948-11-02 |
Thew Shovel Co |
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1960-12-01 |
1962-09-11 |
Poor & Co |
Crawler tread
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1961-03-01 |
1965-01-12 |
Utah Scient Res Foundation |
Smooth-riding self-cleaning endless track
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1962-09-21 |
1964-04-07 |
Poor & Co |
Link for crawler track
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1964-06-08 |
1967-03-07 |
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1969-12-15 |
1971-08-24 |
Caterpillar Tractor Co |
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1970-03-31 |
1973-02-26 |
Haegglund & Soener Ab |
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1970-05-08 |
1972-08-01 |
Bucyrus Erie Co |
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1972-12-01 |
1975-10-21 |
Fiat Allis Construct Machine |
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1976-10-26 |
1978-06-27 |
Caterpillar Tractor Co. |
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1977-05-06 |
1985-11-21 |
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1977-08-15 |
1979-02-13 |
Harnischfeger Corporation |
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1977-10-12 |
1979-11-27 |
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1977-12-23 |
1981-07-14 |
Bucyrus-Erie Company |
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1979-10-11 |
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1984-03-13 |
1986-04-22 |
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1984-09-05 |
1986-12-17 |
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1986-06-16 |
1989-02-21 |
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2000-05-15 |
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2001-10-31 |
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2012-07-31 |
2014-02-13 |
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2012-08-14 |
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2013-05-24 |
2017-07-20 |
Joy Global Surface Mining Inc |
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2017-09-28 |
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2016-08-09 |
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2014-05-22 |
2016-01-26 |
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