20.4
11/10/1987
RPI 890
The letters patent expired on 12/07/1993: 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: 11/10/1987. We update with every new RPI gazette, published weekly.
Applicants
Durocrin Colchões Especiais Ltda
Inventors
A. D. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
11/10/1987
RPI 890
#16.1
09/27/1983
RPI 675
#13.1
05/10/1983
RPI 655
#9.1
11/30/1982
RPI 632
#21.1
12/07/1993
RPI 1201
01/15/1991
RPI 1050
05/22/1990
RPI 1019
From the same holder
Same category
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