Pedido de licença compulsória
#20.1
09/23/1986
RPI 831
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Official data from INPI
SISTEMA DE LIGACAO DE TELEFONE DE DIVISAO DE TEMPO
Em AnáliseInvention Patent
Progress at the INPI
- Filing02/01/78
- Publication
- Examination
- Allowance10/13/82
- Grant05/31/83
- Expired06/21/94
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: 09/23/1986. We update with every new RPI gazette, published weekly.
Applicants and inventors
Applicants
NIPPON TELEGRAPH & TELEPHONE
Inventors
E. T. (pessoa física)
H. K. (pessoa física)
T. T. (pessoa física)
T. K. (pessoa física)
Technical data
IPC Classification
Prosecution history
Publications in the Brazilian Industrial Property Gazette (RPI).
Concessão da patente
#16.1
05/31/1983
RPI 658
Notificação para pagamento de retribuição
#13.1
02/16/1983
RPI 643
Deferimento
#9.1
10/13/1982
RPI 625
15.0
05/18/1982
RPI 604
Exigência - art. 36 da LPI
#6.1
04/13/1982
RPI 599
Carta-patente expirada
#21.1
06/21/1994
RPI 1229
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