Joseph S. Droho

Person

Chicago, IL, US

People

Patents Grantslast 30 patents

Information Patent Grant
Unique electrical coil with tap
- Patent number 5,574,419
- Issue date Nov 12, 1996
- Philips Electronics North America Corporation
- Joseph S. Droho
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of making an electrical coil
- Patent number 5,485,669
- Issue date Jan 23, 1996
- Philips Electronics North America Corporation
- Joseph S. Droho
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Electrical transformer structure with coil covers
- Patent number 5,440,286
- Issue date Aug 8, 1995
- North American Philips Corporation
- Henry Pikul
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
HID lamp and auxiliary lamp ballast using a single multiple functio...
- Patent number 5,430,354
- Issue date Jul 4, 1995
- North American Philips Corporation
- Glenn D. Garbowicz
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Combination including an emergency lighting arrangement
- Patent number 5,175,469
- Issue date Dec 29, 1992
- North American Philips Corporation
- Joseph S. Droho
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Ignitor circuit for discharge lamps with novel ballast
- Patent number 5,132,870
- Issue date Jul 21, 1992
- North American Philips Corporation
- Joseph S. Droho
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Control equipment for multi-speed electric motors
- Patent number 5,103,153
- Issue date Apr 7, 1992
- North American Philips Corporation
- Joseph S. Droho
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Ballast circuit with means to disconnect power factor capacitor
- Patent number 5,072,156
- Issue date Dec 10, 1991
- North American Philips Corporation
- Joseph S. Droho
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Ignitor circuit for discharge lamps with novel ballast
- Patent number 5,051,664
- Issue date Sep 24, 1991
- Joseph S. Droho
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Ignitor circuit for discharge lamps with novel ballast
- Patent number 5,017,840
- Issue date May 21, 1991
- North American Philips Corporation
- Joseph S. Droho
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Ignitor for high pressure arc discharge lamps
- Patent number 5,013,977
- Issue date May 7, 1991
- North American Philips Corporation
- Joseph S. Droho
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
High pressure sodium discharge lamp having gas filled outer envelope
- Patent number 4,977,346
- Issue date Dec 11, 1990
- North American Philips Corp.
- Ray G. Gibson
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Ignitor circuit for discharge lamps with novel ballast
- Patent number 4,939,430
- Issue date Jul 3, 1990
- Advance Transformer Company
- Joseph S. Droho
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Hybrid ballast for multiple discharge lamps
- Patent number 4,847,535
- Issue date Jul 11, 1989
- Advance Transformer Co.
- Robert W. Wisbey
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Thermal protection device for a dual input voltage lamp transformer...
- Patent number 4,740,861
- Issue date Apr 26, 1988
- Advance Transformer Company
- Joseph S. Droho
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Three-way fluorescent lamp device
- Patent number 4,593,231
- Issue date Jun 3, 1986
- Advance Transformer Co.
- Robert W. Wisbey
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Discharge lamp ballast circuit
- Patent number 4,406,976
- Issue date Sep 27, 1983
- 501 Advance Transformer Company
- Robert W. Wisbey
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR

Joseph S. Droho

Person

Patents Grantslast 30 patents

Unique electrical coil with tap

Method of making an electrical coil

Electrical transformer structure with coil covers

HID lamp and auxiliary lamp ballast using a single multiple functio...

Combination including an emergency lighting arrangement

Ignitor circuit for discharge lamps with novel ballast

Control equipment for multi-speed electric motors

Ballast circuit with means to disconnect power factor capacitor

Ignitor circuit for discharge lamps with novel ballast

Ignitor circuit for discharge lamps with novel ballast

Ignitor for high pressure arc discharge lamps

High pressure sodium discharge lamp having gas filled outer envelope

Ignitor circuit for discharge lamps with novel ballast

Hybrid ballast for multiple discharge lamps

Thermal protection device for a dual input voltage lamp transformer...

Three-way fluorescent lamp device

Discharge lamp ballast circuit