Portable electronic apparatus having a detachable battery and an optional component for expanding a function
CA 2045299 C · Owner: Yoshida, Mitsuhiro · Inventors: Kobayashi, Takaichi; Yoshida, Mitsuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A portable computer comprises a base unit to which a keyboard and a display unit are attached. First and second batteries, functioning as a drive power source are, attached to the base unit. An optional component may be attached to the base unit in place of the second battery. The optional component for example, can be a modem device, to be connected to a telephone line or an additional memory unit. In the base unit, there is formed a first mounting recess to which the first battery is detachably attached and a second mounting recess to which the second battery or the optional component is selectively detachably attached. A connector is provided entirely within the base unit to permit …
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 June 24, 1991 and granted November 17, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 24, 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.