Direct access storage unit
CA 1283733 C · Owner: International Business Machines Corporation · Inventors: Pohl, Wolfgang D.; Gimzewski, James K.; Duerig, Urs T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Direct Access Storage Unit The storage unit comprises an array of tunnel tips (13) arranged at tunneling distance from a storage medium (2) which is capable of permitting digital information to be written or read through variations of the tunneling current. Each tunnel tip (13) is supported on its own cantilever beam (12) extending across a cavity (14) formed in a common substrate (15). Each cantilever beam (12) as well as the bottom of each cavity (14) are covered with an electrically conducting layer (16 18), enabling the distance between each one of the tunnel tips (13) and the surface of the storage medium (2) to be electrostatically controlled. The storage medium (2) is attached to the …
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 April 30, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 30, 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.