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Submarine signaling

US 2,033,135 A · Inventors: FAY RICHARD D et al.

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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 March 10, 1936. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by March 10, 1953.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledAugust 31, 1929
GrantedMarch 10, 1936
Term endedMarch 10, 1953
Application number—
Classification (CPC)—
Length8 pages

Timeline

Timeline From USPTO dates

19301933193619391942194519481951Application filedAug 31, 1929Patent grantedMarch 10, 1936Term endedMarch 10, 1953

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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