Roger Rehfeldt

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Vernon Hills, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Water softening apparatus with microprocessor control
- Patent number 5,751,598
- Issue date May 12, 1998
- Culligan International Company
- John E. Zabinski
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Circuit and apparatus for controlling a water softener
- Patent number 4,299,698
- Issue date Nov 10, 1981
- Culligan International Company
- Stanley F. Rak
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL