20.4
07/05/1983
RPI 663
The letters patent expired on 07/27/1993: 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: 07/05/1983. We update with every new RPI gazette, published weekly.
Applicants
K. L. (pessoa física)
Inventors
W. F. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
07/05/1983
RPI 663
#16.1
02/24/1982
RPI 592
#21.1
07/27/1993
RPI 1182
From the same holder
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