Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6411820 | Switchable phase lock loop for dual mode applications A dual-mode wireless telephone which is capable of operating on two different bands of frequencies. The dual-mode telephone having a single phase lock loop combined with a single local oscillator that can select between two frequencies in two widely sprea... | 06/25/2002 |
| 5892107 | Method for the production of levulinic acid A method of producing dehydration products from one or more 5-carbon or 6-carbon sugars includes reacting said one or more sugars at 40°-240 ° C. for 1 to 96 hours in the presence of 10-90% sulfuric acid, separating the reaction products, and recovering... | 04/06/1999 |
