
Permanent magnet motor
Leonard C. Czerniak - US patent number 3935487
http://www.google.com/patents?vid=USPAT3935487

ROTARY TO RECIPROCATING DEVICE
Zane Chadrick Kiniski - US patent 3811058
http://www.google.com/patents?q=patent%3A3811058

RECIPROCATING MOTOR WITH MOTION CONVERSION MEANS
Robert D. Tracy - US patent 3703653
http://www.google.com/patents?q=patent%3A3703653
MAGNETIC MOTOR
HARRY X. -WORTHINGTON - US patent 1724446
http://www.google.com/patents?q=patent%3A1724446
RECIPROCATING MOTOR WITH MAGNETIC DRIVE MEANS
Jack E. Horner - US patent 3636391
http://www.google.com/patents?q=patent%3A3636391
ELECTRIC MOTOR
GUSTAVE SEIDEL - US patent 912037
http://www.google.com/patents?q=patent%3A912037
Hokei Minato magent motor
Hokei Minato - US patent 4751486 - 5594289