20.4
10/25/1988
RPI 940
The letters patent expired on 06/21/1994: 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: 10/25/1988. We update with every new RPI gazette, published weekly.
Applicants
I. S. (pessoa física)
Inventors
M. F. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
10/25/1988
RPI 940
#16.1
11/29/1983
RPI 684
#13.1
08/02/1983
RPI 667
#9.1
03/22/1983
RPI 648
#6.1
03/23/1982
RPI 596
#21.1
06/21/1994
RPI 1229
Same category
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