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Insulator tester

US 1,723,861 A · Inventors: TEIZO ISSHIKI

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Overview

The published document from the USPTO: abstract, claims, description and drawings. Open it full size

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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 August 6, 1929. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by August 6, 1946.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJuly 13, 1925
GrantedAugust 6, 1929
Term endedAugust 6, 1946
Application number—
Classification (CPC)—
Length4 pages

Timeline

Timeline From USPTO dates

1926192919321935193819411944Application filedJuly 13, 1925Patent grantedAug 6, 1929Term endedAug 6, 1946

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

Everything on this page comes from the USPTO record linked above.