Patents - 1969

System and method for alternating current machines, and apparatus therefor
Otto J. M. Smith
U.S. Patent 3,483,463. December 1969

Wheel positioning mechanism using a closed coding ring
Herbert B. Baskin, Paul F. Evans and Larry E. Rittenhouse
U.S. Patent 3,461,449. August 1969

Broadside log-periodic antenna
Kenneth K. Mei
U.S. Patent 3,460,150. August 1969

Linear active network that rotates a nonlinear resistor characteristic through a predetermined angle
Leon O. Chua
U.S. Patent 3,454,908. July 1969

Electron beam thermoplastic recorder with conductor coated thermoplastic recording medium
Thomas E. Everhart
U.S. Patent 3,430,255. February 1969

Low-pass non-reactive frequency selective filter in which high frequencies are absorbed in dissipative material
Charles K. Birdsall and Richard M. White
U.S. Patent 3,427,573. February 1969