Index to the US patent classification / US Department of Commerce, US Patent and Trademark Office
Contributor(s): Resource type: Ressourcentyp: ZeitschriftPeriodicalLanguage: English Volumes: Bände: Show volumesZeige BändePublisher: Washington, DC : US Gov. Print. Off., 1983-ISSN:- 0161-9470
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Mikrofiche-Ausg.: Washington, DC : US Gov. Print. Off.
Washington, DC : US Gov. Print. Off. Mikrofiche-Ausg.: Washington, DC : US Gov. Print. Off
SuDocs-Class.-no. C 21.12/2