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The Fredericks Company
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Huntingdon Valley, PA, US
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Patents Grants
last 30 patents
Information
Patent Grant
Integral electrode tilt sensor and method for making same
Patent number
7,886,451
Issue date
Feb 15, 2011
The Fredericks Company
Andrew Ruether
G01 - MEASURING TESTING
Information
Patent Grant
Electrolytic-tilt-sensor
Patent number
6,688,013
Issue date
Feb 10, 2004
The Fredericks Company
Charles E. Greway
G01 - MEASURING TESTING
Information
Patent Grant
Thermocouple tilt sensing device
Patent number
6,453,571
Issue date
Sep 24, 2002
The Fredericks Company
Wallace R. Crossan
G01 - MEASURING TESTING
Information
Patent Grant
Bayard-alpert vacuum gauge with neutralization of x-ray effect
Patent number
6,257,069
Issue date
Jul 10, 2001
The Fredericks Company
Howard M. Brady
G01 - MEASURING TESTING
Information
Patent Grant
Electrolytic tilt sensor having a metallic envelope
Patent number
6,249,984
Issue date
Jun 26, 2001
The Fredericks Company
Barry E. Barsky
G01 - MEASURING TESTING
Information
Patent Grant
Electrolytic tilt sensing device
Patent number
5,852,878
Issue date
Dec 29, 1998
The Fredericks Company
Joseph J. Seipp
G01 - MEASURING TESTING
Information
Patent Grant
Dual axis electrolytic tilt sensor
Patent number
5,630,280
Issue date
May 20, 1997
The Fredericks Company
Wallace R. Crossan
G01 - MEASURING TESTING
Information
Patent Grant
Ionization gauge having a non-time varying magnetic field generator...
Patent number
5,568,053
Issue date
Oct 22, 1996
The Fredericks Company
Emil Drubetsky
G01 - MEASURING TESTING
Information
Patent Grant
Convection thermocouple vacuum gauge
Patent number
5,351,551
Issue date
Oct 4, 1994
The Fredericks Company
Emil Drubetsky
G01 - MEASURING TESTING
Patents Applications
last 30 patents
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last 30 trademarks