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Official data from INPI

DISPOSITIVO COMUTADOR DE SINAL

Em AnáliseInvention Patent

Application data

Number

PI7606633

Type

Invention Patent

Filing

10/14/1975

Publication

-

Progress at the INPI

  1. Filing10/14/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant04/27/82
  6. Expired07/20/93

The letters patent expired on 07/20/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

Talk to a specialist

Latest action published by the INPI: 08/14/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

NIPPON ELECTRIC CO

Inventors

M. S. (pessoa física)

N. K. (pessoa física)

S. N. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

08/14/1984

RPI 721

20.10

08/07/1984

RPI 720

20.5

05/29/1984

RPI 710

Concessão da patente

#16.1

04/27/1982

RPI 601

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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