15.0
11/24/1981
RPI 579
The letters patent expired on 11/24/1992: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.
Talk to a specialistLatest action published by the INPI: 11/24/1981. We update with every new RPI gazette, published weekly.
Applicants
Western Electric Company Incorporated
US
Inventors
E. B. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
11/24/1981
RPI 579
#16.1
09/29/1981
RPI 571
#15.11
Procedimento automático de reclassificação. As classificações IPC anteriores eram: B23K 3/04; B23P 3/12.
03/27/2018
RPI 2464
#21.1
11/24/1992
RPI 1147
From the same holder
Same category
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