Patents & inventions
Subtitle: an information aid for inventors.
Edition: Revised Aug. 1977.
Publisher: Dept. of Commerce, Patent and Trademark Office : for sale by the Supt. of Docs., U.S. Govt. Print. Off.
Published: 1977
Place of publication: [Washington]
Language: eng
Number of pages: 23
Subjects: Patents -- United States.; Inventions -- United States.
Other titles: Information aid for inventors.
Notes: For background information, see General information concerning patents.