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 |
| 7186472 | Magnetic recording medium A magnetic recording medium comprising a support and a magnetic layer containing an abrasive, a binder and ferromagnetic powder dispersed in the binder, wherein the magnetic layer has a thickness of from 20 to 500 nm, the abrasive has a Mohs' hardness of 5 or more a... | 03/06/2007 |
| 7175927 | Magnetic recording medium utilizing specified non-magnetic particles in the magnetic layer A magnetic recording medium having a non-magnetic support and a magnetic layer formed thereon, wherein the magnetic layer comprises a ferromagnetic powder, a binder and a non-magnetic inorganic powder, and wherein at least 95% of the non-magnetic powder particles co... | 02/13/2007 |
| 7011900 | Magnetic recording medium A magnetic recording medium is prepared by coating a dispersion of non-magnetic powder and ferromagnetic powder in a binder and a dispersion of ferromagnetic powder in a binder to a non-magnetic substrate by a wet-on-wet coating technique to form subordinate and mag... | 03/14/2006 |
| 5348920 | θ-alumina powder, preparation thereof and magnetic recording medium Alumina powder having a θ-alumina content of at least 70% by weight and an average primary particle size at least 0.1 μm and containing a tungsten compound in an amount of 0.1 to 5% by weight in terms of tungsten oxide based on alumina can be used as an... | 09/20/1994 |
| 5141807 | Magnetic recording medium A magnetic recording medium comprising a non-magnetic substrate and a magnetic layer which comprises magnetic powder, a binder and alumina powder having an average primary particle size of not larger than 0.3 μm and containing at least one oxide selected... | 08/25/1992 |
| 4837083 | Magnetic recording medium A magnetic recording medium comprising a plastic base and a magnetic layer formed thereon by applying a dispersion of a ferromagnetic powder in a resin binder, the magnetic layer containing the ferromagnetic powder which has a BET specific surface area of... | 06/06/1989 |
| 4803121 | Magnetic recording medium A magnetic recording medium is disclosed, comprising a non-magnetic support having thereon a magnetic layer comprising ferromagnetic fine particles, a binder, and -alumina particles having an average size of from about 0.1 to 0.3 μm, provided that... | 02/07/1989 |
| 4756962 | Magnetic recording medium A magnetic recording medium, comprising a plastic base coated with a magnetic layer of a ferromagnetic powder dispersed in a resin binder, contains in the magnetic layer -Al2 O3 particles with an average particle size of 0.1 t... | 07/12/1988 |
| 4460651 | Magnetic recording medium A magnetic recording medium comprises a magnetic layer coated on a substrate and composed of ferromagnetic metal or alloy powder dispersed in a binder, wherein the magnetic layer contains Al2 O3 having an average particle size of at ... | 07/17/1984 |
| 4404238 | Precipitated alumina for use in magnetic recording disc media A magnetic recording medium and method of producing the same are taught. The medium comprises magnetic particles and alumina particles dispersed in a binder as a unitary coating whereby each of the alumina particles disposed in the binder is substantially... | 09/13/1983 |
