Mark Andrew Robertson

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Murrieta, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Electrolarynx control button arrangement with improved frequency co...
- Patent number 9,830,127
- Issue date Nov 28, 2017
- Griffin Laboratories (a California corporation)
- Clifford Jay Griffin
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Electrolarynx control button arrangement
- Patent number 9,561,099
- Issue date Feb 7, 2017
- Griffin Laboratories
- Clifford Jay Griffin
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Speech therapy system and method with loudness alerts
- Patent number 9,336,795
- Issue date May 10, 2016
- Griffin Laboratories
- Mark Andrew Robertson
- G10 - MUSICAL INSTRUMENTS ACOUSTICS