loadpatents
Patent applications and USPTO patent grants for duPont; Stephen.The latest application filed is for "internal combustion barrel engine".
Patent | Date |
---|---|
Internal combustion barrel engine Grant 7,509,930 - duPont March 31, 2 | 2009-03-31 |
Internal combustion barrel engine App 20080271715 - duPont; Stephen | 2008-11-06 |
Hearing aid system with acoustical horn Grant 6,160,895 - Dupont December 12, 2 | 2000-12-12 |
Forwards facing rowing apparatus with feathering of the oar blades Grant 5,248,272 - duPont September 28, 1 | 1993-09-28 |
Articulated hydrofoil oar Grant 4,943,250 - DuPont July 24, 1 | 1990-07-24 |
Hydrofoil oar with movable outrigger Grant 4,867,719 - duPont September 19, 1 | 1989-09-19 |
Hydrofoil oar Grant 4,867,718 - duPont September 19, 1 | 1989-09-19 |
Forwards facing hydrofoil oar Grant 4,776,821 - duPont October 11, 1 | 1988-10-11 |
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.