Method and apparatus for cursor movement control
CA 2047887 C · Owner: International Business Machines Corporation · Inventors: Hidaka, Kazuyoshi; Akaishi, Masanori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The constraint mode provided by this invention allows a user to move a cursor of a pointing device such as a mouse, cursor, just along lines and curves on a graphics screen. The user can select a point located on lines and curves correctly even though the pointing device is moved quite roughly. The user can also select a point that divides a segment by an arbitrary ratio, or a point that divides the segment into a plurality of equal parts. The method basically comprises the steps of entering a signal for pointing to a position on a display screen and determining a point on the display screen in response to the entered signal. A point is then determined on the graphics object near to that …
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
- Filed July 25, 1991 and granted December 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 25, 2013.
- 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.