Charles H. Popenoe

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Bethesda, MD, US

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Patents Grantslast 30 patents

Information Patent Grant
Method of making a fastening device for visually indicating tension
- Patent number 7,958,614
- Issue date Jun 14, 2011
- Charles H. Popenoe
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Fluid pressure indicator
- Patent number 5,189,979
- Issue date Mar 2, 1993
- Charles H. Popenoe
- G01 - MEASURING TESTING
Information Patent Grant
Opti-mechanical displacement indicator with high sensitivity
- Patent number 4,904,132
- Issue date Feb 27, 1990
- Charles H. Popenoe
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Radio-frequency tuned-circuit microdisplacement transducer
- Patent number 4,114,428
- Issue date Sep 19, 1978
- Charles H. Popenoe
- G01 - MEASURING TESTING
Information Patent Grant
Light reflective opti-mechanical displacement microindicator
- Patent number 3,987,668
- Issue date Oct 26, 1976
- Charles H. Popenoe
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Opti-mechanical displacement microindicator
- Patent number 3,987,699
- Issue date Oct 26, 1976
- Charles H. Popenoe
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
FASTENING APPARATUS AND METHOD OF MAKING
- Publication number 20090092457
- Publication date Apr 9, 2009
- Charles H. Popenoe
- G01 - MEASURING TESTING