Hasan Tahsin Gencsoy, American Mechanical engineering educator. Achievements include patent for Rotary Piston Coal Feeder, for Wear Compensating Seal Means for Rotary Piston Coal Feeder; patent for Automatic Coin Feeder for Parking Meters; research on measurement of residual stresses and acid rain purification of West Virginia streams. Recipient National Adams Memorial award American Welding Society, 1966.