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Official data from INPI

SISTEMA DE ALTO-FALANTE ELETRÔNICO

PublicadaInvention Patent
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Application data

Number

PI8701340

Type

Invention Patent

Filing

03/24/1987

Publication

12/29/1987
View on INPI

Progress at the INPI

  1. Filing03/24/87
  2. Publication12/29/87
  3. Examination09/11/90
  4. Allowance
  5. Grant
  6. In force

Published on 12/29/1987, the application is awaiting technical examination at the INPI, which decides whether the invention meets the patentability requirements.

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Latest action published by the INPI: 12/29/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Q. W. (pessoa física)

CN

Z. Y. (pessoa física)

CN

Inventors

Q. W. (pessoa física)

CN

Z. Y. (pessoa física)

CN

Technical data

IPC Classification

H04R 3/00H04R 9/06

Priority claims

CN

86201730 · 03/25/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

12/29/1987

RPI 897

Pedido de patente depositado

#2.1

07/07/1987

RPI 872

Retificação

#15.3

02/02/1993

RPI 1157

Solicitação de exame técnico

#4.1

09/11/1990

RPI 1032

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