Herman E. Frentzel

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Sausalito, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Swimming pool cleaner with vibratory power
- Patent number 5,799,351
- Issue date Sep 1, 1998
- Dieter J. Rief
- E04 - BUILDING
Information Patent Grant
In-line leaf trap
- Patent number 5,554,277
- Issue date Sep 10, 1996
- Dieter J. Rief
- E04 - BUILDING
Information Patent Grant
Dual-use and manual pool cleaning apparatus
- Patent number 5,469,596
- Issue date Nov 28, 1995
- Sta-Rite Industries, Inc.
- Dieter J. Rief
- E04 - BUILDING
Information Patent Grant
Replaceable brush rings for pool cleaners
- Patent number 5,428,854
- Issue date Jul 4, 1995
- Sta-Rite Industries, Inc.
- Dieter J. Rief
- E04 - BUILDING
Information Patent Grant
Automatic swimming pool cleaner
- Patent number 5,379,473
- Issue date Jan 10, 1995
- Sta-Rite Industries, Inc.
- Dieter J. Rief
- E04 - BUILDING
Information Patent Grant
Suction regulating valve
- Patent number 5,363,877
- Issue date Nov 15, 1994
- Herman E. Frentzel
- G05 - CONTROLLING REGULATING
Information Patent Grant
Automatic swimming pool cleaner
- Patent number 5,293,659
- Issue date Mar 15, 1994
- Dieter J. Rief
- E04 - BUILDING