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 |
| 7215698 | Position fixing system In a first aspect the present invention provides a method of producing an ultra wide band signal in which a carrier signal is modulated by a spreading waveform which is a periodic deterministic wideband signal and the frequency of the carrier signal is changed by a ... | 05/08/2007 |
| 7093602 | Beauty cap A beauty cap has a plurality of sponge rollers, and a strip of material simulating hair wrapped around each roller and attached to the cap to simulate a user having her hair wrapped in curlers. ... | 08/22/2006 |
| 6622734 | Hair styling device A simple hair styling device is described which allows a person to style and dry his or her hair to be easily either naturally or with a hair dryer. Opposing sides of the device capture the hair and maintain the hair in a set shape while the hair dries. T... | 09/23/2003 |
| 6360752 | Perm hairgrip A perm hairgrip has a first clamp device, a second clamp device, a first adhesive layer, a second adhesive layer, a first ceramic plate, a second ceramic plate, a pivot pin, and a tension spring. The first clamp device has a first holding plate. The secon... | 03/26/2002 |
| 5839450 | Hair curler A new hair curler for simulating the user's hair when the curler is in use curling the user's real hair. The inventive device includes an elongate tubular member and an elongate casing member detachably attachable to the outer surface of the tubular membe... | 11/24/1998 |
| 5000201 | Hair curler roller A hair curler roller having a flexible exterior outer sleeve and a rigid center core, and a strap for holding hair ends on the outer sleeve. The strap may be retractable into the interior of the rigid center core when not in use. A compact low profile hol... | 03/19/1991 |
