Duane E. Cummings

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Monticello, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Light pipe display for sonar
- Patent number 7,495,997
- Issue date Feb 24, 2009
- Nature Vision, Inc.
- Duane E. Cummings
- G01 - MEASURING TESTING
Information Patent Grant
Method for distinguishing return echoes from noise
- Patent number 6,819,629
- Issue date Nov 16, 2004
- MarCum Technologies, Inc.
- Duane E. Cummings
- G01 - MEASURING TESTING
Information Patent Grant
Flasher-type fish finder with zoom feature
- Patent number 6,768,701
- Issue date Jul 27, 2004
- Duane E. Cummings
- G01 - MEASURING TESTING
Information Patent Grant
Dash mounted sonar depth indicator
- Patent number D400450
- Issue date Nov 3, 1998
- MarCum Enterprises, Inc.
- Duane E. Cummings
- D10 - Measuring, testing, or signalling instruments
Information Patent Grant
Gimbal mounted sonar depth indicator
- Patent number D394405
- Issue date May 19, 1998
- MarCum Enterprises, Inc.
- Duane E. Cummings
- D10 - Measuring, testing, or signalling instruments
Information Patent Grant
Solid state depth locator having liquid crystal display
- Patent number 5,459,479
- Issue date Oct 17, 1995
- Marcum Enterprises Incorporated
- Duane E. Cummings
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
AUTO TUNE SONAR SYSTEM
- Publication number 20100097891
- Publication date Apr 22, 2010
- NATURE VISION INC.
- Duane E. Cummings
- G01 - MEASURING TESTING
Information Patent Application
DISPLAY FOR SONAR
- Publication number 20080291121
- Publication date Nov 27, 2008
- Duane E. Cummings
- G01 - MEASURING TESTING
Information Patent Application
External water shutoff
- Publication number 20050205132
- Publication date Sep 22, 2005
- Flow-Tech Industries, Inc.
- Allen J. Nagel
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
Method for distinguishing return echoes from noise
- Publication number 20040202048
- Publication date Oct 14, 2004
- Duane E. Cummings
- G01 - MEASURING TESTING