James H. Spreen

Person

Stone Ridge, NY, US

People

Patents Grantslast 30 patents

Information Patent Grant
Suppression of transformer capacitive current
- Patent number 5,245,521
- Issue date Sep 14, 1993
- International Business Machines Corporation
- James H. Spreen
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Three coil bridge transformer
- Patent number 5,225,971
- Issue date Jul 6, 1993
- International Business Machines Corporation
- James H. Spreen
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Transformer/rectifier assembly with a figure eight secondary structure
- Patent number 5,168,440
- Issue date Dec 1, 1992
- International Business Machines Corporation
- James H. Spreen
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Gapped/ungapped magnetic core
- Patent number 5,155,676
- Issue date Oct 13, 1992
- International Business Machines Corporation
- James H. Spreen
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Combined differential and common mode choke for a power supply
- Patent number 5,119,059
- Issue date Jun 2, 1992
- International Business Machines Corporation
- Kevin R. Covi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Transformer having plural-turn core
- Patent number 4,965,712
- Issue date Oct 23, 1990
- International Business Machines Corporation
- Walter S. Duspiva
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Pluggable power system having magnetic flux coupled power transform...
- Patent number 4,868,732
- Issue date Sep 19, 1989
- International Business Machines Corporation
- John B. Gillett
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Plank and frame transformer
- Patent number 4,864,486
- Issue date Sep 5, 1989
- International Business Machines Corporation
- James H. Spreen
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
D. C. to D. C. converter
- Patent number 4,803,609
- Issue date Feb 7, 1989
- International Business Machines Corporation
- John B. Gillett
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Coupled power supply inductors for reduced ripple current
- Patent number 4,703,409
- Issue date Oct 27, 1987
- International Business Machines Corporation
- James H. Spreen
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

James H. Spreen

Person

Patents Grantslast 30 patents

Suppression of transformer capacitive current

Three coil bridge transformer

Transformer/rectifier assembly with a figure eight secondary structure

Gapped/ungapped magnetic core

Combined differential and common mode choke for a power supply

Transformer having plural-turn core

Pluggable power system having magnetic flux coupled power transform...

Plank and frame transformer

D. C. to D. C. converter

Coupled power supply inductors for reduced ripple current