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Automatic Back Hoe Control System
(U.S. Patent and Trademark Office, 1967-09-05)
This invention relates to a backhoe, and more particularly, to a hydraulically actuated backhoe. Still more particularly, this inventiona relates to an automatice hydraulic backhoe control system which may be placed in ...
Power Conserving Biasing System for a Class B Push-pull Transitor Amplifier Circuit
(U.S. Patent and Trademark Office, 1967-06-06)
This invention relates to an improved class B push-pull transistor amplifier circuit. More particularly, the invention relates to an improved biasing arrangement for a class B push-pull transistor amplifier circuit, the ...