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"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 7132918 | Inductive coil assembly An inductive coil assembly having multiple coils arranged at distinct orientations to provide efficient inductive coupling of power or communications or both to a device when the device is arranged at different orientations with respect to the inductive primary coil... | 11/07/2006 |
| 7079001 | Nuclear fusion reactor incorporating spherical electromagnetic fields to contain and extract energy A nuclear fusion reactor system includes a reactor core containing nuclear fusionable material and a plurality of conducting spheres arranged adjacent each other with at least two of said conducting spheres adjacent the reactor core. The reactor core and the conduct... | 07/18/2006 |
| 6914195 | Distribution transformer An oil-filled pole-mounted distribution transformer comprises a tank housing a transformer core-coil assembly immersed in cooling oil. The tank is made of a corrosion-proof composite material and a radiator is provided for cooling the oil. The radiator is external t... | 07/05/2005 |
| 5415617 | Applicator coil for magnetic field therapy Applicator coil for an electromagnetic therapy apparatus, which has substantially the form of a zone of a sphere deformed into an oval and which is suited above all to rendering a low frequency magnetic alternating field operative on projecting parts of t... | 05/16/1995 |
| 5281941 | Coil form and coil for antenna coils, or the like A coil form for supporting coils of wire includes three intersecting orthogonal plates whose peripheral surfaces together define an imaginary spherical surface. The plate peripheries increase the effective winding area of the coils with respect to the ext... | 01/25/1994 |
| 5146197 | Self-shielding homogeneous spherical gradient coils A first set of three spherically or elliptically shaped coils is provided which generates a homogeneous linear gradient magnetic field in its interior. A second set of three spherically or elliptically shaped coils is located concentric to and in close pr... | 09/08/1992 |
| 5047715 | Electromagnetic device for position measurement having multiple coils with equal area of turn cross-section An electromagnetic device for inductive position measurements for eliminating both the disadvantage of a limited measuring range and the disadvantage of superimposed interference voltages in the event of directional changes by providing a probe having a p... | 09/10/1991 |
| 4752999 | Spherical transformer A spherical transformer and process for forming same is set forth. Hollow, hemispherical elements are rotated to enable a cooperating cutting tool to impart a helical impression therein. An adhesive is sprayed into the interiors of both hemispheres and th... | 06/28/1988 |
| 4717834 | Stripline transformer adapted for inexpensive construction A stripline transformer pulse generator includes a flat ribbon multiple conductor cable and a ground plane of electrically conductive material placed side-by-side and wound together in a coil to form a transformer. The extremities of at least some of the ... | 01/05/1988 |
| 4504812 | Spherical transformer apparatus An improved transformer (20) and method of transformer construction. Primary and secondary windings (30 and 32) are spirally wound onto a spherically shaped core member (24). The core is preferably of laminated construction and can be of either planar or ... | 03/12/1985 |
| 4110806 | Circuit interrupting apparatus for use in direct current circuits Circuit interrupting apparatus for interrupting large direct currents comprising a plurality of parallelly connected branch circuits each including a circuit breaker and a saturable reactor connected in series therewith, and a commutating circuit includin... | 08/29/1978 |
