20.7
11/04/1986
RPI 837
The letters patent expired on 05/03/1994: 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: 11/04/1986. We update with every new RPI gazette, published weekly.
Applicants
P. R. (pessoa física)
Inventors
P. R. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
11/04/1986
RPI 837
#16.1
02/22/1983
RPI 644
#13.1
12/28/1982
RPI 636
#9.1
08/10/1982
RPI 616
#6.1
11/24/1981
RPI 579
#21.1
05/03/1994
RPI 1222
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Same category
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