James Howard

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Tomball, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
System for determining safety margin of an installed driven member
- Patent number 10,533,583
- Issue date Jan 14, 2020
- QTRCO, Inc.
- Edward G. Holtgraver
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Actuator assembly for conducting partial stroke testing
- Patent number 10,132,337
- Issue date Nov 20, 2018
- QTRCO, Inc.
- Edward G. Holtgraver
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Seal assembly for use in harsh environments
- Patent number 9,464,719
- Issue date Oct 11, 2016
- QTRCO, Inc.
- Edward Holtgraver
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
System for Determining Safety Margin of an Installed Driven Member
- Publication number 20180135665
- Publication date May 17, 2018
- QTRCO, Inc.
- Edward G. Holtgraver
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Application
Actuator Assembly for Conducting Partial Stroke Testing
- Publication number 20170314584
- Publication date Nov 2, 2017
- QTRCO, Inc.
- Edward G. Holtgraver
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Application
Seal Assembly for Use in Harsh Environments
- Publication number 20130333554
- Publication date Dec 19, 2013
- Edward Holtgraver
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC