John J. Dobrzanski

Person

New Britain, CT, US

People

Patents Grantslast 30 patents

Information Patent Grant
Reliability and workability test apparatus for an environmental mon...
- Patent number 4,962,368
- Issue date Oct 9, 1990
- General Signal Corporation
- John J. Dobrzanski
- G08 - SIGNALLING
Information Patent Grant
Easily cleaned photoelectric smoke detector
- Patent number 4,672,217
- Issue date Jun 9, 1987
- General Signal Corporation
- John J. Dobrzanski
- G08 - SIGNALLING
Information Patent Grant
Photoelectric smoke detector circuitry
- Patent number 4,654,644
- Issue date Mar 31, 1987
- General Signal Corporation
- John J. Dobrzanski
- G08 - SIGNALLING
Information Patent Grant
Ionization smoke detector
- Patent number 4,439,683
- Issue date Mar 27, 1984
- General Signal Corporation
- John J. Dobrzanski
- G08 - SIGNALLING
Information Patent Grant
Electrical controls for ionization smoke detector
- Patent number 4,401,979
- Issue date Aug 30, 1983
- General Signal Corporation
- John J. Dobrzanski
- G08 - SIGNALLING
Information Patent Grant
Ionization smoke detector with controlled sensitivity
- Patent number 4,171,486
- Issue date Oct 16, 1979
- Emhart Industries, Inc.
- John Dobrzanski
- G08 - SIGNALLING
Information Patent Grant
Smoke detection alarm device
- Patent number 4,038,649
- Issue date Jul 26, 1977
- Emhart Industries, Inc.
- John Dobrzanski
- G08 - SIGNALLING
Information Patent Grant
Ionization smoke detector and alarm system
- Patent number 4,037,206
- Issue date Jul 19, 1977
- Emhart Industries, Inc.
- John Dobrzanski
- G08 - SIGNALLING
Information Patent Grant
Ionization smoke detector and alarm system
- Patent number 3,934,145
- Issue date Jan 20, 1976
- Emhart Corporation
- John Dobrzanski
- G08 - SIGNALLING

John J. Dobrzanski

Person

Patents Grantslast 30 patents

Reliability and workability test apparatus for an environmental mon...

Easily cleaned photoelectric smoke detector

Photoelectric smoke detector circuitry

Ionization smoke detector

Electrical controls for ionization smoke detector

Ionization smoke detector with controlled sensitivity

Smoke detection alarm device

Ionization smoke detector and alarm system

Ionization smoke detector and alarm system