Development and use of patent classification systems

Author(s): United States. Patent Office
Retrieving Holdings Information
Subjects: Patents--United States
Formats: Print
Material Type: Books
Language: English
Audience: Unspecified
Published: Washington, D.C., For sale by the Superintendent of Documents, U.S. Govt. Print. Off., 1966
LC Classification: T
Physical Description: xii, 202 p. illus. 26 cm
Notes: LCCN: 65062235
OCLC Number: 794487