Rll (1,7) encoder with single state bit
CA 1255390 A · Owner: International Business Machines Corporation · Inventors: Fok, Wilson W.; Moussouris, John P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
RLL (1,7) ENCODER WITH SINGLE STATE BIT ABSTRACT OF THE DISCLOSURE, An apparatus for producing from four consecutive, unconstrained data bits in a bit string a run-length-, limited (RLL) encoded symbol consisting of three coded data bits. The internal state of the encoder is described by one state bit. The encoder performs RLL (1,7) encoding on a bit-by-bit basis, and can be cascaded in parallel to perform encoding on sequential, equally-sized groups of unencoded data bits. An attractive feature of the encoder is that it can be cascaded to simultaneously encode consecutive bytes of data. IB37KPA2.E07
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 6, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 6, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.