SPD Electrical Systems, Inc.

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Philadelphia, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Graded resistance solid state current control circuit
- Patent number 8,614,868
- Issue date Dec 24, 2013
- SPD Electrical Systems, Inc.
- Robert Lawler
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Power node switching center with active feedback control of power s...
- Patent number 8,223,469
- Issue date Jul 17, 2012
- SPD Electrical Systems
- John P. Barber
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Power node switching center
- Patent number 7,667,938
- Issue date Feb 23, 2010
- SPD Electrical Systems
- John I Ykema
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
GRADED RESISTANCE SOLID STATE CURRENT CONTROL CIRCUIT
- Publication number 20120243137
- Publication date Sep 27, 2012
- SPD ELECTRICAL SYSTEMS
- Robert Lawler
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Power Node Switching Center With Active Feedback Control Of Power S...
- Publication number 20110007432
- Publication date Jan 13, 2011
- SPD ELECTRICAL SYSTEMS
- John P. Barber
- H01 - BASIC ELECTRIC ELEMENTS

Trademarklast 30 trademarks