Television picture display device
CA 1268248 C · Owner: Boerrigter, Dionysius A. · Inventors: Boerrigter, Dionysius A.; Welles, Petrus W.G.; Van Der Wal, Hendrik
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Television picture display device" In a television picture display device which can display a compressed (by 13) sub-picture of a second video signal source (29) in a main picture of a first video signal source (1), a correct mutual location of the picture information in the sub-picture with respect to the main picture is always obtained by means of a first (55) and a second (119) even-odd field identification circuit for the sub-picture and for the main picture, respectively an, interlacing circuit (71) and an interlacing-correction circuit (125), so that troublesome phenomena no longer occur in the sub-picture upon field transitions (Figure 1).
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 24, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 24, 2007.
- 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.