Patents - 1981

Frequency detector device and method
David G. Messerschmitt
U.S. Patent 4,308,505. December 1981

Fiber optic transmission line stabilization apparatus and method
Robert A. Frosch, George F. Lutes, Jr. and Kam Y. Lau
U.S. Patent 4,287,606. September 1981

Fabrication of Optical Waveguides by Indiffusion of Metals
John R. Carruthers, Ivan P. Kaminow and Ronald V. Schmidt
U.S. Patent 4,284,663. August 1981

Method of fabricating photovoltaic cells
Terry I. Chappell and Richard M. White
U.S. Patent 4,255,212. March 1981

Apparatus for providing radiative heat rejection from a working fluid used in a Rankine cycle type system
S. Phyllis and Otto J. M. Smith
U.S. Patent 4,249,386. February 1981

Heliostat with a protective enclosure
Otto J. M. Smith
U.S. Patent 4,247,182. January 1981