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All Patents in class 414/909 | |||||
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Picture | Number | Date | Patentee | Title | |
613,809 | Nov. 08, 1898 | N. Tesla | Method of and Apparatus for Controlling Mechanism of Moving Vessels or Vehicles | ||
![]() | 2,145,977 | Feb. 07, 1939 | B.N. Foster | Solenoid actuated valve |