20.4
08/16/1983
RPI 669
The letters patent expired on 05/24/1994: 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: 08/16/1983. We update with every new RPI gazette, published weekly.
Applicants
E. A. (pessoa física)
Inventors
B. A. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
08/16/1983
RPI 669
#16.1
03/29/1983
RPI 649
02/22/1983
RPI 644
#13.1
03/02/1982
RPI 593
#9.1
11/10/1981
RPI 577
#21.1
05/24/1994
RPI 1225
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Same category
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