Otto Fest

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Tucson, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Solid state analog meter
- Patent number 10,222,405
- Issue date Mar 5, 2019
- Otto P. Fest
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Signal or loop powered automatic multicolor display and controller
- Patent number 9,054,725
- Issue date Jun 9, 2015
- Otto P. Fest
- G08 - SIGNALLING
Information Patent Grant
Loop powered current-loop wireless transmitter
- Patent number 7,684,768
- Issue date Mar 23, 2010
- Otto P. Fest
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signal powered A.C. current transformer electronic measuring circuit
- Patent number 7,626,378
- Issue date Dec 1, 2009
- Otto P. Fest
- G01 - MEASURING TESTING
Information Patent Grant
Current loop powered isolator and method
- Patent number 7,477,080
- Issue date Jan 13, 2009
- Otto Fest
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Loop-powered current-loop controller and method
- Patent number 6,285,094
- Issue date Sep 4, 2001
- Otto P. Fest
- G08 - SIGNALLING
Information Patent Grant
Transformerless line powdered digital AC voltmeter
- Patent number 4,908,569
- Issue date Mar 13, 1990
- Otto P. Fest
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
METER REPLACEMENT SYSTEM
- Publication number 20240127976
- Publication date Apr 18, 2024
- Otto Fest
- G21 - NUCLEAR PHYSICS NUCLEAR ENGINEERING
Information Patent Application
SOLID STATE ANALOG METER
- Publication number 20180364288
- Publication date Dec 20, 2018
- Otto P. Fest
- G01 - MEASURING TESTING