Australian application, no grantAustralia
Improvements in or relating to apparatus forthe reproduction of sound having a diaphragm of relatively large surface anda screen plate
AU 1930024770 · Applicant: Christiaan Henri Henny Max Adolf Henny
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 January 23, 1931. Even if it was granted, its term would have ended by January 23, 1952.
- A pharmaceutical extension adds at most five years, so even that would have ended by January 23, 1957.
- We check Australian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 23, 1931
GrantedNo grant recorded
Term ended byJanuary 23, 1952
Application numberAU 1930024770
Classification (IPC)H04R1/28
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.