The Fredericks Company

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Intl Class Technology # of Patents/ App Rank in Class
 
 
 
G01C MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY 479

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7,886,451 Integral electrode tilt sensor and method for making sameMar 04, 09Feb 15, 11[G01C]
6,688,013 Electrolytic-tilt-sensorDec 13, 01Feb 10, 04[G01C]
6,249,984 Electrolytic tilt sensor having a metallic envelopeApr 06, 00Jun 26, 01[G01C]
5,852,878 Electrolytic tilt sensing deviceJul 14, 97Dec 29, 98[G01C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Filing Date Issue/Pub Date Intl Class
2004/0016,137 Electrolytic tilt sensor having a meniscus inhibitorDec 19, 00Jan 29, 04[G01C]
6,453,571 Thermocouple tilt sensing deviceSep 28, 00Sep 24, 02[G01C]
6,257,069 Bayard-alpert vacuum gauge with neutralization of x-ray effectOct 28, 98Jul 10, 01[G01L]
5,630,280 Dual axis electrolytic tilt sensorMay 01, 95May 20, 97[G01C]
5,568,053 Ionization gauge having a non-time varying magnetic field generator of separated opposed magnetsMar 31, 95Oct 22, 96[G01L]
5,351,551 Convection thermocouple vacuum gaugeMay 27, 93Oct 04, 94[G01L]

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