Official data from INPI

SEM TITULO

ConcedidaInvention Patent

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Application data

Number

PI7600882

Type

Invention Patent

Filing

02/11/1976

Publication

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Progress at the INPI

Filing02/11/76
Publication
Examination
Allowance
Grant02/24/82
Expired09/21/93

The letters patent expired on 09/21/1993: 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: 02/24/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

S. D. (pessoa física)

Inventors

E. B. (pessoa física)

Technical data

IPC Classification

H04Q 3/04

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

02/24/1982

RPI 592

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

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