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Signaling by high-frequency currents

US 1,680,554 A · Inventors: KLONECK AUGUST J

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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 14, 1928. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by August 14, 1945.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledApril 18, 1921
GrantedAugust 14, 1928
Term endedAugust 14, 1945
Application number—
Classification (CPC)H04B1/48
Length6 pages

Timeline

Timeline From USPTO dates

19221925192819311934193719401943Application filedApril 18, 1921Patent grantedAug 14, 1928Term endedAug 14, 1945

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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

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