Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12023614 | Portable air filter cleaning devices and methods of use | — | 2024-07-02 |
| 11541339 | Portable air filter cleaning devices and methods of use | — | 2023-01-03 |
| 8779322 | Method and apparatus for processing metal bearing gases | William M. Holber, Xing Chen, Donald K. Smith | 2014-07-15 |
| 8704171 | Chemical ionization reaction or proton transfer reaction mass spectrometry | Timothy R. Robinson, Mark Attwood, Xing Chen, William M. Holber, Mark Philip Longson +2 more | 2014-04-22 |
| 8633782 | Radio frequency power delivery system | Siddharth P. Nagarkatti, Michael Kishinevsky, Ali Shajii, Timothy E. Kalvaitis, William McKinney +2 more | 2014-01-21 |
| 8334505 | Chemical ionization reaction or proton transfer reaction mass spectrometry | Timothy R. Robinson, Mark Attwood, Xing Chen, William M. Holber, Mark Philip Longson +2 more | 2012-12-18 |
| 8124906 | Method and apparatus for processing metal bearing gases | William M. Holber, Xing Chen, Donald K. Smith | 2012-02-28 |
| 8003935 | Chemical ionization reaction or proton transfer reaction mass spectrometry with a quadrupole mass spectrometer | Timothy R. Robinson, Mark Attwood, Xing Chen, William M. Holber, Mark Philip Longson +2 more | 2011-08-23 |
| 8003936 | Chemical ionization reaction or proton transfer reaction mass spectrometry with a time-of-flight mass spectrometer | Timothy R. Robinson, Mark Attwood, Xing Chen, William M. Holber, Mark Philip Longson +2 more | 2011-08-23 |
| 7764140 | Radio frequency power delivery system | Siddharth P. Nagarkatti, Michael Kishinevsky, Ali Shajii, Timothy E. Kalvaitis, William McKinney +3 more | 2010-07-27 |
| 7621290 | Gas delivery method and system including a flow ratio controller using antisymmetric optimal control | Junhua Ding, Kaveh Zarkar | 2009-11-24 |
| 7569790 | Method and apparatus for processing metal bearing gases | William M. Holber, Xing Chen, Donald K. Smith | 2009-08-04 |
| 6948508 | Apparatus and method for self-calibration of mass flow controller | Ali Shajii, Nicholas Kottenstette, Jesse E. Ambrosina | 2005-09-27 |
| 6857323 | Two phase flow sensor using tomography techniques | Ali Shajii, Siddharth P. Nagarkatti | 2005-02-22 |
| 6813943 | Method and apparatus for conditioning a gas flow to improve a rate of pressure change measurement | Ali Shajii | 2004-11-09 |
| 6610428 | Controlled conversion of metal oxyfluorides into superconducting oxides | Michael Cima, Neville Sonnenberg | 2003-08-26 |
| 6172009 | Controlled conversion of metal oxyfluorides into superconducting oxides | Michael J. Cima, Neville Sonnenberg | 2001-01-09 |
| 5500591 | Methods and apparatus for detecting substances containing nuclei of a first and second kind | Julian D. Shaw | 1996-03-19 |
| 4887034 | Methods and apparatus for detecting certain compounds | — | 1989-12-12 |