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Expired, full termArchiveSolo inventor

Assemblage of internal-combustion engines and their associated mechanisms.

US 1,237,331 A

USPTO PDF

Overview

4 drawing sheets

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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.

Why it's free to use

  • Granted August 21, 1917. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by August 21, 1934.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
Filed—
GrantedAugust 21, 1917
Term endedAugust 21, 1934
Application number—
Classification (CPC)F02B67/04
Length8 pages

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