Solicitação de exame técnico
#4.1
11/22/1988
RPI 944
Application data
Number
PI8501814Type
Filing
Publication
The letters patent expired on 07/15/2008: 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: 11/22/1988. We update with every new RPI gazette, published weekly.
Applicants
Fundação CPqD - Centro de Pesquisa e Desenvolvimento em Telecomunicações
BR
Telecomunicações Brasileiras S/A - Telebrás
SP, BR
Inventors
L. B. (pessoa física)
BR
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#4.1
11/22/1988
RPI 944
#3.1
11/11/1986
RPI 838
#2.1
06/25/1985
RPI 766
#21.1
Patente extinta em 28/03/2000
07/15/2008
RPI 1958
#25.1
Transferido de: Telecomunicações Brasileiras S/A-TELEBRÁS
05/11/1999
RPI 1479
#16.1
05/28/1991
RPI 1069
#13.1
12/11/1990
RPI 1045
#9.1
08/28/1990
RPI 1030
#6.1
02/01/1990
RPI 1004
From the same holder
Same category
Patent monitoring
Receive alerts on INPI events, decisions, and expiry dates for your portfolio.