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 |
| 6283473 | Method of operating progressive reel slot machines and device therefor A method of increasing gaming activity and entertainment value of progressive reel slot machines involving providing a progressive reel slot machine, publishing certain critical parameters, and providing a means or an equation to allow players to calculat... | 09/04/2001 |
| 3999041 | Summing calculator to assist analysis of past performance A calculating device for use in conjunction with past performance data conventionally compiled and published on each active thoroughbred horse performing on U.S. racetracks, has three cooperating transparent slides each indexed visibly in terms of racehor... | 12/21/1976 |
