Expired Australian patentAustralia
Levelling device for ladder
AU 1983018522 · Applicant: P & O Australia Ltd
Overview
Drawings and full text
Its specification, documents and status are on IP Australia's AusPat.
Open the AusPat recordRead the whole patent
Listed from its IP Australia record in Patent Yard's archive of Australian patents past their term. Its claims, description and drawings are in the AusPat record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed August 30, 1983. An Australian petty patent lasted at most 6 years from its date of patent, at most a year after this filing, so it ended by August 30, 1990.
- We check Australian rights only. A patent in its family in another country could still be in force.
FiledAugust 30, 1983
GrantedMarch 22, 1984
Term ended byAugust 30, 1990
Application numberAU 1983018522
Classification (IPC)E06C7/44
Timeline
Timeline From IP Australia dates
Sources & verification
Official IP Australia records
Everything on this page comes from the IP Australia record linked above. Data from IP Australia's IPGOD, licensed under CC BY 2.5 AU.