Expired, full termArchiveSolo inventor
Playing piece return mechanism
US 2,521,563 A · Inventors: BOCK JOSEPH E
Overview
1 drawing sheet
Every sheet is in the USPTO PDF.
Open the USPTO PDFRead the whole patent
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 September 5, 1950. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by September 5, 1967.
- We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledDecember 31, 1949
GrantedSeptember 5, 1950
Term endedSeptember 5, 1967
Application number—
Classification (CPC)A63F7/22
Length5 pages
Sources & verification
Official USPTO records
Cross-check elsewhere
Everything on this page comes from the USPTO record linked above.