United States patent digest, 1979, class 350
Subtitle: optics, systems, and elements.
Contributors: Boston Patent Company.
Publisher: Boston Patent Co.
Published: 1981
Place of publication: Needham Heights, Mass. (Post Office Box 55, Needham Heights 02194)
Language: eng
Number of pages: 506
Subjects: Optical instruments -- Patents.; Patents -- United States.
Other titles: Optics, systems, and elements.; U.S. patent digest, 1979, class 350.; US patent digest, 1979, class 350.
Notes: Spine title: U.S. patent digest, 1979, class 350.
Includes indexes.