Walter E. Ratzat

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Silver Spring, MD, US

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Patents Grantslast 30 patents

Information Patent Grant
Systems and methods for editing a model of a physical system for a...
- Patent number 9,104,791
- Issue date Aug 11, 2015
- Immersion Corporation
- Robert Cohen
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Apparatus for providing condition-based vibrotactile feedback
- Patent number 8,717,852
- Issue date May 6, 2014
- Immersion Corporation
- Robert F. Cohen
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Apparatus and method for providing condition-based vibrotactile fee...
- Patent number 8,351,299
- Issue date Jan 8, 2013
- Immersion Corporation
- Robert F. Cohen
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

Information Patent Application
Apparatus for Providing Condition-Based Vibrotactile Feedback
- Publication number 20130120153
- Publication date May 16, 2013
- Immersion Corporation
- Robert F. Cohen
- A46 - BRUSHWARE
Information Patent Application
Systems and Methods For Editing A Model Of A Physical System For A...
- Publication number 20100305928
- Publication date Dec 2, 2010
- Immersion Corporation
- Robert Cohen
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Apparatus and Method for Providing Condition-Based Vibrotactile Fee...
- Publication number 20090320227
- Publication date Dec 31, 2009
- Immersion Corporation
- Robert F. Cohen
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE