United States patent digest, 1978
Subtitle: computer printers, copiers, typewriters, and related supplies.
Contributors: Boston Patent Company.
Edition: International ed.
Publisher: Boston Patent Co.
Published: 1980
Place of publication: Needham Heights, Mass. (Post Office Box 55, Needham Heights 02194)
Language: eng
Number of pages: 1475
Subjects: Computer printers -- Patents.; Copying machines -- Patents.; Typewriters -- Patents.
Notes: Includes indexes.