Universal planisphere, sight reduction finder and identifier, guidance and computer system
CA 1090750 A · Owner: Eisenhauer Manufacturing Company (The) · Inventors: Eisenhauer, William A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A planisphere including a navigation west and east dial and scales, sky map, Greenwich and transit indicator dials having an Aries indicator, a Greenwich indicator and a transit scale indicator respectively thereon and a refer-, ence rule, constructed and arranged to facilitate programming of the elements thereof to provide an automatic computerized reading directly of local hour angle of stars from a local hour angle scale on the sky mask dial for entering sight reduction tables for navigation purposes. The planisphere also includes specific time zone indications to facilitate correct programming thereof and a declination scale on the reference indicator for determining declination of …
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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 December 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 2, 1997.
- 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.