Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7359677 | Device and methods for high isolation and interference suppression switch-filter Systems and methods are provided for a stacked die configuration of a high isolation switch and a rejection filter where transmit and receive signals are desired to have a high out-of-band rejection and a low loss band-pass region. In some aspects of the invention t... | 04/15/2008 |
| 7209083 | Radio-frequency device In a radio-frequency device in which a dielectric layer, a first conductive layer and a second conductive layer are stacked one on another, the second conductive layer is including a plurality of conductive elements which are arrayed periodically and independently o... | 04/24/2007 |
| 7123210 | Loop-type antenna The invention concerns an antenna for use as transmission/reception beacon (2), in a radio frequency identifying system, having a general upturned U configuration, located in a vertical plane, above the ground transversely to a passage (9), the vertica... | 10/17/2006 |
| 7072613 | Wireless communication medium processing apparatus and wireless communication medium processing system This invention is a wireless communication medium processing apparatus which carries out communication with a wireless communication medium, to carry out at least one of reading and writing as to information which was stored in the wireless communication medium, and... | 07/04/2006 |
| 7027008 | Antenna ground system An antenna system includes an electrical grounding system for a low power radio transmitter of a traveler's information station. The antenna system includes an elongated metal tube having a lower portion configured to be received in the ground and an upper portion a... | 04/11/2006 |
| 6977626 | Low-loss printed circuit board antenna structure and method of manufacture thereof The present invention provides a method of manufacturing an antenna structure. In one embodiment, the method includes forming an antenna trace on a substrate proximate a ground plane of the substrate. In addition, the method includes creating an insulation region ex... | 12/20/2005 |
| 6940458 | Electronic equipment and antenna mounting printed-circuit board A PDA includes a printed-circuit board on which at least one printed antenna pair having two chip-like printed antennas, which receive linearly polarized signals and are disposed along axes orthogonal to each other, is mounted. In each of the printed antennas, an op... | 09/06/2005 |
| 6927730 | Radiation device with a L-shaped ground plane A radiation device having a L-shaped ground plane. The radiation device comprises a radiation patch; a feeding-in device for exciting the radiation patch; and a L-shaped ground plane. The L-shaped ground plane has a first ground plane and a second ground plane, and ... | 08/09/2005 |
| 6873300 | Antenna system utilizing elevated, resonant, radial wires An antenna system is presented including an electrically conductive radiating mast that extends generally vertical relative to earth ground. The mast has a lower end for receiving RF energy for radiation thereby at an operating RF frequency and an upper end. A plura... | 03/29/2005 |
| 6774850 | Broadband couple-fed planar antennas with coupled metal strips on the ground plane A broadband couple-fed planar antenna including radiating strips on the ground plane. Plural radiating strips are electrically connected to a ground plane and are formed on the same plane of the ground plane. The radiating strip has a first segment extended from an ... | 08/10/2004 |
| 6744409 | High efficiency transmit antenna A planar inverted-F antenna (PIFA) to facilitate communications within a plurality of frequency bands is disclosed. The top plate of the PIFA is placed at a predetermined height above a ground plane and shorting pins are placed in contact between the top plate and t... | 06/01/2004 |
| 6670923 | Dual feel multi-band planar antenna A three-band, two-antenna, assembly includes a planar inverted-F antenna (PIFA) having a radiating/receiving element that is spaced from and extends generally parallel to a ground plane element. The planar radiating/receiving element of an inverted-F ante... | 12/30/2003 |
| 6466170 | Internal multi-band antennas for mobile communications An internal multi-band antenna (10) for a mobile communication devices having a planar radiating element (12) and a ground plane conductor (14) disposed substantially parallel thereto with a dielectric (16) such as air or a substrate therebetween. The rad... | 10/15/2002 |
| 6188371 | Low-profile adjustable-band antenna A low-profile antenna includes a ground-plane element defining a ground plane and an elongated radiator element configured and disposed in relation to the ground plane to define a vertical loop when the ground plane is horizontally disposed. A substantial... | 02/13/2001 |
| 5440315 | Antenna apparatus for capacitively coupling an antenna ground plane to a moveable antenna An antenna apparatus for a hand-held symbology reader device having a housing and an elongated one-quarter wavelength antenna. A rotatable coupling member has an L-shaped conductor fixedly and electrically coupled to the antenna by a first end thereof. A ... | 08/08/1995 |
| 5233362 | Maypole antenna An antenna (20) has a set of elongated electrically conductive radiating elements (24) disposed about a central mast (26) in the form of a maypole. The radiating elements are electrically connected to each other at a top end of the mast by a top ring (28)... | 08/03/1993 |
| 4994820 | Plane antenna A plane antenna comprising first and second plates made of a synthetic resin. The first plate has a first metal film formed thereon and the second plate has a second metal film formed thereon. A plurality of pins extend between the first and second plates... | 02/19/1991 |
| 4839661 | Guided wave antenna system and method A novel underground guided wave antenna system and method. The system comprises at least one substantially linear, electrically insulated radiating element which is buried in the earth so as to lie no more than approximately one skin depth below the earth... | 06/13/1989 |
| 4829310 | Wireless communication system using current formed underground vertical plane polarized antennas A wireless communication system and method for employing underground or low profile surface deployed current drivers for inducing ground currents in the earth which define loop antennas for sending and receiving electromagnetic signals propagated through ... | 05/09/1989 |
| 4809010 | Low profile wireless communication system and method A transportable wireless communication system and method for employing lightweight, compact, low profile surface deployed current drivers which are capable of rapid deployment and quick retrieval and which are used for inducing ground currents in the eart... | 02/28/1989 |
| 4395713 | Transit antenna A transit antenna in which a grounded base is provided. A housing is mounted on the base. The chamber and base define a chamber. A substrate is fixed to the base. The housing and substrate have interconnected surfaces to maintain the substrate in substant... | 07/26/1983 |
