John M. Sewell

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Cockeysville, MD, US

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Patents Grantslast 30 patents

Information Patent Grant
High sensitivity noise immune stethoscope
- Patent number 9,078,571
- Issue date Jul 14, 2015
- Active Signal Technologies, Inc.
- Keith Bridger
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
High sensitivity noise immune stethoscope
- Patent number 8,265,291
- Issue date Sep 11, 2012
- Active Signal Technologies, Inc.
- Keith Bridger
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Brain assessment monitor
- Patent number 6,887,199
- Issue date May 3, 2005
- Active Signal Technologies, Inc.
- Keith Bridger
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Compact hybrid actuator
- Patent number 6,751,954
- Issue date Jun 22, 2004
- Keith Bridger
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Physiological sensing device
- Patent number 6,491,647
- Issue date Dec 10, 2002
- Active Signal Technologies, Inc.
- Keith Bridger
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Apparatus and method for measurement of intracranial pressure with...
- Patent number 5,919,144
- Issue date Jul 6, 1999
- Active Signal Technologies, Inc.
- Keith Bridger
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Method and apparatus for acoustic attenuation
- Patent number 5,394,376
- Issue date Feb 28, 1995
- Martin Marietta Corporation
- Laurence R. Riddle
- G10 - MUSICAL INSTRUMENTS ACOUSTICS

Patents Applicationslast 30 patents

Information Patent Application
HIGH SENSITIVITY NOISE IMMUNE STETHOSCOPE
- Publication number 20120302920
- Publication date Nov 29, 2012
- Active Signal Technologies, Inc.
- Keith Bridger
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
High sensitivity noise immune stethoscope
- Publication number 20070165872
- Publication date Jul 19, 2007
- Active Signal Technologies, Inc.
- Keith Bridger
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
Compact hybrid actuator
- Publication number 20030126981
- Publication date Jul 10, 2003
- Keith Bridger
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Application
Brain assessment monitor
- Publication number 20020198469
- Publication date Dec 26, 2002
- Keith Bridger
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC