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Frederick A. Stich
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Milwaukee, WI, US
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last 30 patents
Information
Patent Grant
Brushless exciter for controlling excitation of a synchronous machine
Patent number
4,659,973
Issue date
Apr 21, 1987
Siemens Energy & Automation, Inc.
Frederick A. Stich
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Gating of the thyristors in an arcless tap changing regulator
Patent number
4,622,513
Issue date
Nov 11, 1986
Siemens Energy & Automation, Inc.
Frederick A. Stich
G05 - CONTROLLING REGULATING
Information
Patent Grant
Digitally controlled overload relay
Patent number
4,539,618
Issue date
Sep 3, 1985
Siemens-Allis, Inc.
Frederick A. Stich
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Time ratio control circuit for contactor or the like
Patent number
4,516,185
Issue date
May 7, 1985
Siemens-Allis, Inc.
John C. Culligan
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Power supply for electronic control system
Patent number
4,456,871
Issue date
Jun 26, 1984
Siemens-Allis, Inc.
Frederick A. Stich
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Electronic control system for overload relay or the like
Patent number
4,446,498
Issue date
May 1, 1984
Siemens-Allis, Inc.
Frederick A. Stich
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Solid state circuit protection system and method
Patent number
4,423,459
Issue date
Dec 27, 1983
Siemens-Allis, Inc.
Frederick A. Stich
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Signal processing system for overload relay or the like
Patent number
4,423,458
Issue date
Dec 27, 1983
Siemens-Allis, Inc.
Frederick A. Stich
G01 - MEASURING TESTING
Information
Patent Grant
Circuit interrupter having flash plates with interrupted surfaces
Patent number
4,404,442
Issue date
Sep 13, 1983
Siemens-Allis, Inc.
Frederick A. Stich
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Conduction limit protection arrangement for power transistor switch
Patent number
4,378,580
Issue date
Mar 29, 1983
Allis-Chalmers Corporation
Frederick A. Stich
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Arcless tap changer for voltage regulator
Patent number
4,363,060
Issue date
Dec 7, 1982
Siemens-Allis, Inc.
Frederick A. Stich
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Arcless tap changer utilizing static switching
Patent number
4,301,489
Issue date
Nov 17, 1981
Siemens-Allis, Inc.
Frederick A. Stich
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Power circuit for variable frequency, variable magnitude power cond...
Patent number
4,128,793
Issue date
Dec 5, 1978
Allis-Chalmers Corporation
Frederick A. Stich
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Adjustable speed electric motor drive having constant harmonic content
Patent number
4,123,692
Issue date
Oct 31, 1978
Allis-Chalmers Corporation
Thomas P. Gilmore
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Inverter having constant frequency chopper synchronized to modulati...
Patent number
4,050,006
Issue date
Sep 20, 1977
Allis-Chalmers Corporation
Frederick A. Stich
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Variable frequency, variable voltage power supply
Patent number
4,048,554
Issue date
Sep 13, 1977
Allis-Chalmers Corporation
Frederick A. Stich
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Transistor inverter motor drive having voltage boost at low speeds
Patent number
3,971,972
Issue date
Jul 27, 1976
Allis-Chalmers Corporation
Frederick A. Stich
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Transistor bridge inverter motor drive having reduced harmonics
Patent number
3,967,173
Issue date
Jun 29, 1976
Allis-Chalmers Corporation
Frederick A. Stich
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Electronic commutation system having motor stator windings in push-...
Patent number
3,931,553
Issue date
Jan 6, 1976
Allis-Chalmers Corporation
Frederick A. Stich
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER