Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8363222 | Particulate tester with mixer for analytical application | Gerald A. Szpak, Keith Bender, Shawn A. Hogan, Robert A. Moss | 2013-01-29 |
| 7789552 | Particulate tester with mixer for analytical application | Gerald A. Szpak, Keith Bender, Shawn A. Hogan, Robert A. Moss | 2010-09-07 |
| 7355706 | Particle detection system implemented with an immersed optical system | Richard K. DeFreez, James Brady | 2008-04-08 |
| 7002682 | Method and apparatus for operating a laser in an extinction-type optical particle detector | Adam J. Reed | 2006-02-21 |
| 6784990 | Particle detection system implemented with a mirrored optical system | Richard K. DeFreez, James Brady | 2004-08-31 |
| 6137572 | High sensitivity optical fluid-borne particle detection | Richard K. DeFreez, Mingguang Li | 2000-10-24 |
| 6111642 | Flow apertured intracavity laser particle detector | Richard K. DeFreez, Frederic Schildmeyer | 2000-08-29 |
| 6061132 | Dual detector array with noise cancellation for a particle size detection device | Richard K. DeFreez | 2000-05-09 |
| 6016194 | Particles counting apparatus and method having improved particle sizing resolution | Richard K. DeFreez | 2000-01-18 |
| 5946092 | Dual laser heterodyne optical particle detection technique | Richard K. DeFreez, Mingguang Li | 1999-08-31 |
| 5903347 | Particle counter employing a chromium based solid-state laser with an intracavity view volume | Richard K. DeFreez | 1999-05-11 |
| 5864399 | Method for counting particles in a fluent stream | Richard K. DeFreez | 1999-01-26 |
| 5684585 | Optical particle counter employing a field-calibrator | — | 1997-11-04 |
| 5642193 | Particle counter employing a solid-state laser with an intracavity view volume | Richard K. DeFreez | 1997-06-24 |
| 5565984 | Re-entrant illumination system for particle measuring device | — | 1996-10-15 |
| 5438420 | Monitoring of fluid contamination level wherein the light energy is focused on the fluid passage means | Warren J. Harwick, Holger T. Sommer | 1995-08-01 |