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Drawing attachment for a microscope

US D250,412 S · Assignee: American Optical Corporation · Inventors: Armbruster; John T.

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Overview

1 drawing sheet

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Listed from its USPTO record in Patent Yard's full-term archive. Its claims, description and drawings are in the USPTO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Granted November 28, 1978. A US design patent lasts 14 years from grant (15 if filed from May 13, 2015), so this one ended November 28, 1992.
  • A design patent protects only how a product looks. We check US rights only.
FiledMarch 2, 1977
GrantedNovember 28, 1978
Term endedNovember 28, 1992
Application number05/773725
Classification (CPC)—
Length2 pages

Sources & verification

Official USPTO records

Full published documentText and every drawing sheet as a PDF.USPTOFile historyStatus, office actions, notices, fee records and petitions.USPTO Patent CenterPatent Public Search recordSearchable full text and bibliographic data.USPTO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comJustia PatentsFull text, claims and classification.patents.justia.comFreePatentsOnlineFull text and PDF.freepatentsonline.comEspacenetForeign family and legal status.European Patent Office

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