Fluorescent display tube for light source
CA 1257638 A · Owner: Ise Electronics Corporation · Inventors: Kobayashi, Masaaki; Tatsuda, Kazunori; Okubo, Yosiyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluorescent display tube includes a plurality of phosphor screens formed on a front panel of an envelope to constitute a matrix, a plurality of cathode electrodes floating from the inner surface of a rear panel of the envelope and corresponding to the phosphor screens so as to constitute a matrix in the same manner as the phosphor screens, grid electrodes which are arranged between the phosphor screens and the cathode electrodes of the rows of the matrix and each of which has electron beam apertures and stripe-like back electrodes formed on the inner surface of the rear panel so as to correspond to the columns of the matrix. A voltage applied to the cathode electrodes is higher or lower …
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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 18, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 18, 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.