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Official data from INPI

CIRCUITO EXCITADOR DE DISPOSITIVO EMISSOR DE LUZ PARA RELOGIO ELETRONICO A CRISTAL LIQUIDO

ConcedidaInvention Patent

Application data

Number

PI7605766

Type

Invention Patent

Filing

09/09/1975

Publication

-

Progress at the INPI

  1. Filing09/09/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant11/10/81
  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.

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Latest action published by the INPI: 11/10/1981. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SEIKO INSTR & ELECTRONICS

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Inventors

I. T. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/10/1981

RPI 577

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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