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Official data from INPI

SISTEMA DE TROCA DE TELEFONE UTILIZANDO APARELHOS TELEFONE UTILIZANDO APARELHOS TELEFONICOS

Em AnáliseInvention Patent

Application data

Number

PI8004167

Type

Invention Patent

Filing

07/03/1979

Publication

-

Progress at the INPI

  1. Filing07/03/79
  2. Publication
  3. Examination
  4. Allowance07/12/83
  5. Grant01/31/84
  6. Terminated06/21/88

The patent was granted on 01/31/1984 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 06/21/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

TAMURA ELECTRIC WORKS LTD

Inventors

C. A. (pessoa física)

J. K. (pessoa física)

M. K. (pessoa física)

M. M. (pessoa física)

N. S. (pessoa física)

Pessoa física

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Anuidade - prazo legal encerrado

#18.2

06/21/1988

RPI 922

Cessão de direito de exploração

#22.1

12/10/1985

RPI 790

Concessão da patente

#16.1

01/31/1984

RPI 693

Notificação para pagamento de retribuição

#13.1

11/08/1983

RPI 681

Deferimento

#9.1

07/12/1983

RPI 664

6.2

10/19/1982

RPI 626

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