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Inventor

RISBERG ROBERT L

US9 patents
⚠️ This page may combine multiple inventors who share the name “RISBERG ROBERT L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

RISBERG ROBERT L

4 patents
US4465943AAug 14, 1984

Uninterrupted power system with frequency and phase control

RISBERG ROBERT L54 citations91
US4811072AMar 7, 1989

Semiconductor device

RISBERG ROBERT L11 citations72
US4623910ANov 18, 1986

Semiconductor device

RISBERG ROBERT L11 citations72
US4054818AOct 18, 1977

Solid state current source polyphase inverter induction motor drive

RISBERG ROBERT L18 citations72

MILLER ELECTRIC MFG

2 patents
US4769754ASep 6, 1988

Stabilized welding power source including a series-resonant current-regulated converter using a transformer having an air-gapped core

MILLER ELECTRIC MFG90 citations95
US4216367AAug 5, 1980

Wireless remote control for electric welder

MILLER ELECTRIC MFG103 citations95

HOBART BROTHERS CO

1 patent
US4435632AMar 6, 1984

Three phase square wave welding power supply

HOBART BROTHERS CO28 citations91

PARK OHIO INDUSTRIES INC

1 patent
US4370703AJan 25, 1983

Solid state frequency converter

PARK OHIO INDUSTRIES INC46 citations91

CUTLER HAMMER INC

1 patent
US4180767ADec 25, 1979

Closed-loop regulating and overhauling load energy dissipating chopper type current control system for D.C. Motors

CUTLER HAMMER INC2 citations61