Educational kit
CA 2260384 A1 · Owner: Fromm, Wayne G. · Inventors: Fromm, Wayne G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An educational kit which permits a child to create a series of illustrations which may follow a story line or the like, each of which illustrations may be corrected. The kit includes non-toxic water based dry erase pens a, housing with an endless roll of continuous sheet material having a drawing surface which can be advanced past a window in the housing so that one or more of a series of drawings may be drawn upon the drawing surface of the endless roll. The child may return to previous drawing drawn upon the surface of the endless roll to correct or totally erase a frame. The eraser as well as the non-toxic water based pens may be received in a storage compartment of the housing. …
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 January 29, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 29, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2021.
- 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.