Campbell; Donald N.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Campbell; Donald N..The latest application filed is for "selective ionization of gas constituents using electrolytic reactions".
- Campbell; Donald N. - Timonium MD
- Campbell; Donald N. - Lake Jackson TX
- Campbell; Donald N. - Sherwood Park Alberta CA
| Patent | Date |
|---|---|
| Selective ionization of gas constituents using electrolytic reactions Grant 5,053,343 - Vora , et al. October 1, 1 | 1991-10-01 |
| All ceramic ion mobility spectrometer cell Grant 5,021,654 - Campbell , et al. June 4, 1 | 1991-06-04 |
| Process for replacing a length of buried pipe Grant 5,013,188 - Campbell , et al. May 7, 1 | 1991-05-07 |
| Thermionic ionization source Grant 4,928,033 - Spangler , et al. May 22, 1 | 1990-05-22 |
| Selective ionization of gas constituents using electrolytic reactions Grant 4,839,143 - Vora , et al. June 13, 1 | 1989-06-13 |
| Ion mobility spectrometer Grant 4,712,008 - Vora , et al. December 8, 1 | 1987-12-08 |
| Electrochemical gas sensor Grant 4,595,486 - Schmidt , et al. * June 17, 1 | 1986-06-17 |
| Enzymatic toxic gas sensor Grant 4,525,704 - Campbell , et al. June 25, 1 | 1985-06-25 |
| Method of and system for real time differential pulse detection Grant 4,500,391 - Schmidt , et al. February 19, 1 | 1985-02-19 |
| Chemical conversion for ion mobility detectors using surface interactions Grant 4,378,499 - Spangler , et al. March 29, 1 | 1983-03-29 |
uspto.report is an independent third-party trademark research tool that is not affiliated, endorsed, or sponsored by the United States Patent and Trademark Office (USPTO) or any other governmental organization. The information provided by uspto.report is based on publicly available data at the time of writing and is intended for informational purposes only.
While we strive to provide accurate and up-to-date information, we do not guarantee the accuracy, completeness, reliability, or suitability of the information displayed on this site. The use of this site is at your own risk. Any reliance you place on such information is therefore strictly at your own risk.
All official trademark data, including owner information, should be verified by visiting the official USPTO website at www.uspto.gov. This site is not intended to replace professional legal advice and should not be used as a substitute for consulting with a legal professional who is knowledgeable about trademark law.
| 