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| Number | Title | Issue Date |
| 4740794 | Connectorless antenna coupler A metal shield is dimensioned to enclose a portion of a portable radio having an internal antenna and a first transmission line. A transmission line mounted in the shield is positioned to be adjacent to the first transmission line when the shield engages ... | 04/26/1988 |
| 4547901 | Microwave receiving apparatus using a waveguide filter In a microwave receiving apparatus using a waveguide filter, the waveguide filter is disposed in parallel to a microwave reception circuit board mounted in a shield container.... | 10/15/1985 |
| 4542076 | Metallized molded plastic component housings for shielding against electromagnetic interference fields The invention relates to molded pieces of plastic having at least a partial metal coating of their surfaces. The surfaces to be coated are roughened up by means of suitable pretreatment so that a good adhesion of the metal coating on the molded pieces is ... | 09/17/1985 |
| 4500920 | RF Modulator In furnishing an RF modulator with a reference signal generator for generating a specified test signal, and a switching circuit for switching a video signal and the test signal on occasion; the reference signal generator and the switching circuit are rece... | 02/19/1985 |
| 4455682 | Superregenerative radio receiver A superregenerative type radio receiver is provided that is particularly adapted for avoiding frequency shift of the receiver from a preselected tuned frequency regardless of installation environment for the receiver. The receiver comprises a superregener... | 06/19/1984 |
| 4414425 | Broadband non-contacting RF shielding gasket An RF gasket for reducing the flow of energy in the interface area between two conductive surfaces includes a plurality of stub pairs. These stub-pairs are dimensioned to form sub-groups of low impedance paths between the two conductive surfaces with each... | 11/08/1983 |
| 4262365 | RFI shield for an IR input circuit A thin metal RFI (radio frequency interference) shield for an IR (infra-red) input circuit including an IR transducer for a remote control receiver has slot-like apertures with louver-like members formed by twisting the metal between the slot-like apertur... | 04/14/1981 |
| 4161816 | Method of making relay and RF adaptor assembly A plurality of contact pins project from a flat header of a miniature relay for connection to a corresponding number of coaxial cables. A separate radio frequency adaptor is provided having a plurality of hollow cable connector receiving shells and a plan... | 07/24/1979 |
| 4004227 | Radio frequency interference (RFI) testing by the dual screen room technique The RFI generated by a piece of electrical or electronic equipment is meaed by placing the equipment within a screened test room. A pick-up antenna within the room generates a signal which, after filtering and amplification, drives a reference antenna in... | 01/18/1977 |
| 3973202 | Portable electronic system for use with a direct current source having a ground of either positive or negative polarity A portable system of electronic sound equipment for use in vehicles and the like having a direct current electrical system with either a positive or negative ground, wherein the equipment includes one or more of an AM/FM radio, a tape player, and a citize... | 08/03/1976 |
