20.4
05/31/1983
RPI 658
The letters patent expired on 08/25/1992: 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: 05/31/1983. We update with every new RPI gazette, published weekly.
Applicants
D. A. (pessoa física)
DE
Inventors
E. B. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
05/31/1983
RPI 658
04/27/1982
RPI 601
#16.1
02/24/1982
RPI 592
#21.1
08/25/1992
RPI 1134
From the same holder
Same category
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