Optical recording tape with continuous prerecorded tracks
CA 1286610 C · Owner: Drexler Technology Corporation · Inventors: Arnold, Joseph B.; Drexler, Jerome
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical recording medium in tape form which may either be strips of tape or reels of tape all having, preformatted continuous servo tracks from one end to the other. Preformatted servo tracks are spaced-apart lines so as to permit data spots to be written between or on the tracks. The tracks may extend either longitudinally parallel to the lengthwise direction of the tape or in a perpendicular direction, extending in directions transverse to the length of the tape, or in a grid-like pattern. The tape web may be joined to a web of transparent protective material over the surface of the strip. A data card may be made using a strip of such tape without regard to registration of the tape …
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 July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2008.
- 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.