Australian application, no grantAustralia
Recording amplifier with optional feedback
AU 1939001598 · Applicant: Electrical Research Products Inc
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 April 12, 1939. Even if it was granted, its term would have ended by April 12, 1960.
- A pharmaceutical extension adds at most five years, so even that would have ended by April 12, 1965.
- We check Australian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 12, 1939
GrantedNo grant recorded
Term ended byApril 12, 1960
Application numberAU 1939001598
Classification (IPC)—
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.