Australian application, no grantAustralia
Improvements relating to automatic telephone systems
AU 1927009806 · Applicant: Siemens Brothers & Co Limited
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 May 22, 1928. Even if it was granted, its term would have ended by May 22, 1949.
- A pharmaceutical extension adds at most five years, so even that would have ended by May 22, 1954.
- We check Australian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 22, 1928
GrantedNo grant recorded
Term ended byMay 22, 1949
Application numberAU 1927009806
Classification (IPC)H04Q1/50 +1 more
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.