Brief nontechnical answers to questions most frequently asked about Patents. Same as above for plant patents. Copies of the specification and drawings of all patents are available at one dollar and fifty cents each. When ordering, identify the patent by the patent number, or give full name of the inventor and approximate date of issuance of the patent. Contain the changes in classification of patents as well as definitions of new and revised classes and subclasses.
Price is based upon size of publication.
Weekly Class Sheets. Lists showing classification of each patent in the weekly issue of the Patent Official Gazette. The Patent and Trademark Office does not handle the sale of the Manual, distribution of notices and revisions, or change of address of those on the subscription list. Certification Branch Washington, D.C. 20231 Previous editions and revisions of the Manual are available on microfilm in the Public Search Room. Employees of the Patent and Trademark Office should direct their requests for the Manual, replacement pages, notices, and revisions to the Patent Academy.