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Patents for Derrel N. Stewart
Patents 1 - 6 of 6
First set of recordsLast set of records
NumberDatePatenteeTitleType
3,231,022Jan. 25, 1966J.W. Schroeter, D.N. StewartAxial fan construction
3,294,315Dec. 27, 1966D.N. Stewart, R. OlsonFan construction
CA-779,131Feb. 27, 1968J.W. Schroeter, D.N. StewartAxial fan construction
CA-795,649Oct. 01, 1968O. Russell, D.N. StewartFan construction
3,545,884Dec. 08, 1970J.W. Schroeter, D.N. StewartAdjustable fan construction
CA-917,119Dec. 19, 1972D.N. Stewart, J.W. SchroeterAdjustable fan construction
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