20.4
12/15/1987
RPI 895
The letters patent expired on 09/21/1993: 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: 12/15/1987. We update with every new RPI gazette, published weekly.
Applicants
YOKOGAWA ELECTRIC WORKS LTD
Inventors
N. S. (pessoa física)
N. M. (pessoa física)
U. H. (pessoa física)
W. Y. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
12/15/1987
RPI 895
11/01/1983
RPI 680
#16.1
11/10/1981
RPI 577
#21.1
09/21/1993
RPI 1190
From the same holder
Same category
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