Darrell P. Ophaug

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Marion, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Phase barrier for use in a multiphase circuit breaker
- Patent number 5,910,757
- Issue date Jun 8, 1999
- Square D Company
- William J. Broghammer
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Clutch module with predetermined torque
- Patent number 4,921,083
- Issue date May 1, 1990
- Square D Company
- Ronald J. Etscheidt
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Field installable electrical operator for a circuit breaker
- Patent number 4,912,380
- Issue date Mar 27, 1990
- Square D Company
- Henry J. Zylstra
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Ground fault receptacle
- Patent number 4,084,203
- Issue date Apr 11, 1978
- Square D Company
- Robert E. Dietz
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Undervoltage release for circuit breaker
- Patent number 4,041,423
- Issue date Aug 9, 1977
- Square D Company
- Darrell P. Ophaug
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Multiple duty components of a ground fault receptacle
- Patent number 4,013,929
- Issue date Mar 22, 1977
- Square D Company
- Robert E. Dietz
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER