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 |
| 7249909 | Vehicle restraining system The specification and drawing figures describe and show a vehicle restraining system that includes a truss assembly. A rotateable drum is repositionable on the truss assembly. A gravitationally deployable vehicle restraining device is removably attachable to the dru... | 07/31/2007 |
| 7055441 | Counterbalanced deck for railroad freight car A railroad car includes a body having a pair of side walls and at least a pair of parallel horizontal support beams extending along the side walls at substantially the same height. A movable end portion of a deck built as a lightweight composite structure may pivot ... | 06/06/2006 |
| 6923238 | Multi-panel door with an auxiliary drive mechanism A multi-panel sliding door includes a main drive to directly move a leading door panel and includes an auxiliary drive to smoothly accelerate a lagging door panel. In some embodiments, the auxiliary drive includes a hanging weight that urges the lagging panel to its... | 08/02/2005 |
| 6352097 | Multi-panel door with an auxiliary drive mechanism A multi-panel sliding door includes a main drive to directly move a leading door panel and includes an auxiliary drive to smoothly accelerate a lagging door panel. In some embodiments, the auxiliary drive includes a hanging weight that urges the lagging p... | 03/05/2002 |
| 5447468 | Fume hood A fume hood for venting fumes comprising a cabinet, a venting system, and a split sash. The cabinet defines a working area. The cabinet has a front face which comprises an opening for providing access to the working area. The venting system is connected t... | 09/05/1995 |
| 5323876 | Elevator door mechanism An elevator door mechanism that has a rotating shaft, a reversible driving means to turn the shaft, a linear drive actuator riding on and moving along the shaft, a resilient isolated pillow block mounted on spacers at each end of the shaft to dampen the n... | 06/28/1994 |
| 4862639 | Drive-in window A serving window for installation in drive-through facilities such as fast food restaurants is disclosed. The window unit comprises two window members carried by rotatable shafts and set in a support frame, preferably of stainless steel, with an operating... | 09/05/1989 |
| 4852300 | Stacking gates or doors A pair of stacking gates or doors has a trailing gate and a leading gate which roll along parallel tracks between a retracted position with the gates approximately side-by-side and an extended position with the leading gate further from the retracted posi... | 08/01/1989 |
| 4826264 | Security closure A domestic security closure in a form of a cabinet having a front opening (9) defined at the top of a framework (2) partially embedded in the floor and providing a guide for a pair of rigid steel doors (10,12) which can be lifted by use of a counter-weigh... | 05/02/1989 |
| 3977123 | Upwardly-acting door structure An upwardly-acting door structure is adapted to close an access opening of a body member, such as an automobile-carrying railroad car. The door structure includes a stationary track on either side of the opening, movable tracks mounted for upward and down... | 08/31/1976 |
