20.4
09/01/1987
RPI 880
The letters patent expired on 11/17/1992: 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: 09/01/1987. We update with every new RPI gazette, published weekly.
Applicants
A. C. (pessoa física)
US
Inventors
E. B. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
09/01/1987
RPI 880
#16.1
10/14/1980
RPI 521
#21.1
11/17/1992
RPI 1146
From the same holder
Same category
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