20.4
08/23/1983
RPI 670
The letters patent expired on 07/26/1994: 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: 08/23/1983. We update with every new RPI gazette, published weekly.
Applicants
K. L. (pessoa física)
Inventors
N. H. (pessoa física)
W. L. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
08/23/1983
RPI 670
#16.1
05/31/1983
RPI 658
#13.1
02/16/1983
RPI 643
#9.1
10/13/1982
RPI 625
#6.1
05/25/1982
RPI 605
#4.1
10/06/1981
RPI 572
#21.1
07/26/1994
RPI 1234
From the same holder
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