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Patents for William B. Fell
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
2,211,201Aug. 13, 1940W.B. FellMachinist's precision levelspirit levels
2,316,777Apr. 20, 1943W.B. FellMachinist's precision levelspirit levels
3,030,710Apr. 24, 1962W.B. FellMicro-precision levelsspirit levels
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