Expired design patentArchive
Ferrite core
US D280,810 S · Assignee: T.D.K. Corp. · Inventors: Mitsui; Tadashi
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 October 1, 1985. A US design patent lasts 14 years from grant (15 if filed from May 13, 2015), so this one ended October 1, 1999.
- A design patent protects only how a product looks. We check US rights only.
FiledJune 18, 1982
GrantedOctober 1, 1985
Term endedOctober 1, 1999
Application number06/389900
Classification (CPC)—
Length2 pages
Sources & verification
Official USPTO records
Cross-check elsewhere
Everything on this page comes from the USPTO record linked above.