Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7019518 | Non-contacting apparatus and method for measurement of ferromagnetic metal thickness | James R. Carl | 2006-03-28 |
| 6975120 | Measurement of subterranean lithology using electromagnetic energy | — | 2005-12-13 |
| 6744263 | Apparatus and method for the measurement of electrical properties of materials through non-magnetizable materials | — | 2004-06-01 |
| 6657440 | Propagation of waves through materials | — | 2003-12-02 |
| 6630831 | Measurements of electrical properties through non magneticially permeable metals using directed magnetic beams and magnetic lenses | — | 2003-10-07 |
| 6628118 | Method and apparatus for control of magnetic flux direction and concentration | — | 2003-09-30 |
| 6597186 | Through tank level gauging | — | 2003-07-22 |
| 6597177 | Through casing resistivity measurement in permanently installed downhole production environment | — | 2003-07-22 |
| 6553838 | Detection of anomalies on railroad tracks | — | 2003-04-29 |
| 6392421 | Spectral EM frequency metallic thickness measurement using metallic transparencies | — | 2002-05-21 |
| 6351245 | Use of phase coded permeability lensing to obtain directional information in electro-magnetic radiation | — | 2002-02-26 |
| 5879543 | Filter and dehydrator apparatus with threaded collar | — | 1999-03-09 |
| 5852404 | Apparatus for the detection and identification of metal particles, coolant or water in engine oil or hydraulic fluid | — | 1998-12-22 |
| 5693185 | Method of oxidatively treating a substrate with an equilibrium mixture of caro's acid and a percarboxylic acid | Hou-Min Chang, Hasan Jameel, Junfu Song, Dingru Pan, John Robert Webster +1 more | 1997-12-02 |
| 5643470 | Centrifugal flow separator method | — | 1997-07-01 |
| 5589032 | Process for preparing a bleaching liquor containing percarboxylic acid and caro's acid | Hou-Min Chang, Hasan Jameel, Junfu Song, Dingru Pan, John Robert Webster +1 more | 1996-12-31 |
| 5235077 | Process for preparing phenyl esters of substituted acids | Donald J. Dumas, Ronald A. Fong, George C. Sonnichsen | 1993-08-10 |
| 5153341 | Process for preparing benzenesulfonate salts | Donald J. Dumas, George C. Sonnichsen | 1992-10-06 |
| 5139763 | Class of stable potassium monopersulfate compositions | — | 1992-08-18 |