Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 6549907 | Multi-dimensional database and data cube compression for aggregate query support on numeric dimensions An apparatus and method for efficiently compressing contents of a database system to support ad hoc querying and OLAP type aggregation queries. This invention consists of a new compressed representation of the data cube that (a) drastically reduces storag... | 04/15/2003 |
| 6542886 | Sampling over joins for database systems A database server supports weighted and unweighted sampling of records or tuples in accordance with desired sampling semantics such as with replacement (WR), without replacement (WoR), or independent coin flips (CF) semantics, for example. The database se... | 04/01/2003 |
| 6532458 | Sampling for database systems A database server supports weighted and unweighted sampling of records or tuples in accordance with desired sampling semantics such as with replacement (WR), without replacement (WoR), or independent coin flips (CF) semantics, for example. The database se... | 03/11/2003 |
| 6529901 | Automating statistics management for query optimizers In a database system, a method for determining a set of essential statistics. A set of potentially relevant, but unconstructed, statistics for a user query comprising a plurality of operators is compiled. A first value is assigned to the unconstructed sta... | 03/04/2003 |
| 6496208 | Method and apparatus for visualizing and exploring large hierarchical structures Method and apparatus for displaying and navigating data organized in the form of a graph structure (hierarchy or network) is presented. The invention has application for displaying a system of interconnected nodes such as a graph, a network, an organizati... | 12/17/2002 |
| 6485553 | Filler material and wax composition for use in investment casting A wax composition for use in investment casting having improved properties includes polyethylene terephthalate as a filler material. The amount of polyethylene terephthalate used in the wax composition ranges from about 5 to about 50 parts by weight of th... | 11/26/2002 |
| 6482372 | Process for recovering palladium from a solution A method for selectively separating and recovering palladium from an aqueous palladium/tin catalyst solution. The method includes the steps of adjusting the pH of the aqueous solution to a specified pH range thereby precipitating the tin, and producing a ... | 11/19/2002 |
| 6471876 | Filter media with germicidal properties Filtration media having germicidal properties for use in filtering particles and deactivating, removing and/or destroying microorganisms from a feed liquid passing therethrough. The filtration media includes an effective amount of a germicidal chemically ... | 10/29/2002 |
| 6457545 | Hall effect seat switch A Hall effect safety switch assembly for de-activating a motor vehicle if a user is not positioned on a vehicle seat. The assembly includes a switch frame for mounting the assembly, a magnet and a hall effect sensor mounted to the switch frame in a spaced... | 10/01/2002 |
| 6450467 | Tilt adjustable keyboard support A keyboard supporting member has a generally planar keyboard support surface whose orientation is adjustable. A keyboard engaging member defines aligned incline defining slots on opposite sides of a center section. A second, workstation engaging member al... | 09/17/2002 |
| 6399175 | Graphite bursting disc A pressure relief device comprises an unimpregnated graphite membrane having a gas impermeable coating.... | 06/04/2002 |
| 6187096 | Spray assembly for molten metal A pump for coating molten metal onto a substrate includes a base with an impeller chamber, at least one molten metal inlet opening to the base, at least one molten metal outlet opening from the base, and an impeller connected to one end of a motor driven ... | 02/13/2001 |
| 6123263 | Hand held dataform reader having strobing ultraviolet light illumination assembly for reading fluorescent dataforms A portable data collection device having a modular imaging-based dataform reader. The dataform reader includes a two dimensional imaging assembly adapted to image and decode a dataform printed using ink that fluoresces when illuminated by ultraviolet ligh... | 09/26/2000 |
| 6120577 | Treatment of steel mill waste metal oxides A process of recovering iron values and separating zinc oxides and other contaminants from steel mill waste metal oxides, such as blast furnace dust, BOF dust, mill scale and oily sludges, characterized by iron metallization levels up to 95% or more and z... | 09/19/2000 |
| 5865767 | Guidewire having compound taper A guidewire for a catheter having a corewire that includes a compound taper at its distal end portion. The compound taper of the corewire has a first taper that transitions into a second taper. The first taper proximal of the distal tip of the corewire ha... | 02/02/1999 |
