20.7
04/12/1988
RPI 912
The letters patent expired on 05/03/1994: 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: 04/12/1988. We update with every new RPI gazette, published weekly.
Applicants
QT ENG EQUIPAMENTOS SA
Inventors
F. W. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
04/12/1988
RPI 912
#16.1
11/29/1983
RPI 684
#13.1
11/16/1983
RPI 682
09/06/1983
RPI 672
#12.1
11/16/1982
RPI 630
#9.1
07/06/1982
RPI 611
04/06/1982
RPI 598
#6.1
11/10/1981
RPI 577
#21.1
05/03/1994
RPI 1222
Same category
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