Official data from INPI

CAIXA ACUSTICA CONJUGADA COM AMPLIFICADOR

Em AnáliseUtility Model

Talk to an expert

Application data

Number

MU5701586

Type

Utility Model

Filing

12/16/1977

Publication

View on INPI

Progress at the INPI

Filing12/16/77
Publication
Examination
Allowance
Grant06/29/82
Invalidated02/07/84

The patent was invalidated by the INPI in an administrative invalidity proceeding. Protection no longer exists.

Talk to a specialist

Latest action published by the INPI: 02/07/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MAGALHAES E

Inventors

M. E. (pessoa física)

Technical data

IPC Classification

H04R 1/02

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

200

02/07/1984

RPI 694

Anuidade - prazo legal encerrado

#18.2

09/06/1983

RPI 672

Pedido de licença voluntária

#17.1

08/09/1983

RPI 668

Concessão da patente

#16.1

06/29/1982

RPI 610

From the same holder

CARRETEL IMPULSOR APERFEICOADO PARA MAQUINAS DE ETIQUETAR

Same category

MICROFONE SEM FIO DOTADO DE CÂMARA DE RESSONÂNCIA.PI9917905 PI9917904 PI9917902 PI9917898 PI9917895 PI9917684 PI9917655

Explore category

Patent monitoring

Track this patent in real time.

Receive alerts on INPI events, decisions, and expiry dates for your portfolio.