Inventor

STICH FREDERICK A

US30 patents

⚠️ This page may combine multiple inventors who share the name “STICH FREDERICK A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

STICH FREDERICK A

SIEMENS ALLIS INC

Solid state circuit protection system and method

Power supply for electronic control system

Digitally controlled overload relay

Electronic control system for overload relay or the like

Signal processing system for overload relay or the like

Arcless tap changer for voltage regulator

Arcless tap changer utilizing static switching

Time ratio control circuit for contactor or the like

Circuit interrupter having flash plates with interrupted surfaces

ALLIS CHALMERS

Transistor inverter motor drive having voltage boost at low speeds

Transistor bridge inverter motor drive having reduced harmonics

Power circuit for variable frequency, variable magnitude power conditioning system

Adjustable speed electric motor drive having constant harmonic content

Electronic commutation system having motor stator windings in push-pull

Conduction limit protection arrangement for power transistor switch

Inverter having constant frequency chopper synchronized to modulation frequency

Variable frequency, variable voltage power supply

BEST POWER TECH INC

Back-up uninterruptible power system

Method and apparatus for line power monitoring for uninterruptible power supplies

Uninterruptible power system

Inverter and battery testing for uninterruptible power systems

Front panel unit for electronic equipment

GEN SIGNAL CORP

Standby power system

Dynamic voltage regulation stabilization for AC power supply systems

SIEMENS ENERGY & AUTOMAT

Brushless exciter for controlling excitation of a synchronous machine

Gating of the thyristors in an arcless tap changing regulator

BEST POWER TECHNOLOGY CORP

Method and apparatus for determination of battery run-time in uninterruptible power system

POWERWARE CORP

Inverter having center switch and uninterruptible power supply implementing same

GEN SIGNAL POWER SYSTEMS INC

Method and apparatus for adaptive and corrective determination of battery run-time in uninterruptible power systems

PENNSYLVANIA TRANSFORMER TECHN

Load tap changer