20.4
08/22/1989
RPI 983
The letters patent expired on 11/22/1994: 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: 08/22/1989. We update with every new RPI gazette, published weekly.
Applicants
SOBRAL IND COM SA [BR]
Inventors
S. D. (pessoa física)
IPC Classification
No IPC classification.
Publications in the Brazilian Industrial Property Gazette (RPI).
08/22/1989
RPI 983
#16.1
04/26/1988
RPI 914
#13.1
11/10/1987
RPI 890
#9.1
07/14/1987
RPI 873
#15.11
06/23/1987
RPI 870
#4.1
10/14/1986
RPI 834
#3.1
02/25/1986
RPI 801
#2.1
09/18/1984
RPI 726
#21.1
11/22/1994
RPI 1251
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