20.4
08/23/1988
RPI 931
The letters patent expired on 06/21/1994: 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: 08/23/1988. We update with every new RPI gazette, published weekly.
Applicants
WOLPAC IND METALURGICA LTD
Inventors
W. C. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
08/23/1988
RPI 931
#16.1
10/30/1984
RPI 732
#13.1
06/12/1984
RPI 712
04/17/1984
RPI 704
#12.1
12/20/1983
RPI 687
#9.1
08/30/1983
RPI 671
#6.1
04/12/1983
RPI 651
#6.1
08/24/1982
RPI 618
#21.1
06/21/1994
RPI 1229
Same category
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