Document file
CA 1320670 C · Owner: Mitsuyama, Masuhiro · Inventors: Mitsuyama, Masuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A document file having a pair of covers and a plurality of bag members put one upon another and sealed together and to the cover at all edges except the top edge. Each cover has an auxiliary sheet hot-sealed to one side of the cover at three edges. The auxiliary sheet has a wide gusset to form a large pocket between the cover and the auxiliary sheet. Alternatively the padding, enclosed in the cover has a smaller width than the width of the cover to form a large pocket between the cover and the auxiliary sheet.
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 July 27, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 27, 2010.
- 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.