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| Number | Title | Issue Date |
| 7844068 | Wall mounted speaker system, apparatus and method A wall mounted speaker system which is arranged to alleviate problems of unwanted noise in the production and transmission of audio waves, particularly in the lower wave lengths from 20 to 200 hz. There is a speaker unit having a pair of vertically spaced speakers, ... | 11/30/2010 |
| 7208897 | Motion control system for barrier drive A system for operating a barrier system such as a garage door, gate or fence. A DC motor is connected to and operates a barrier drive. A power amplifier is configured to receive power signals from a power supply and to output modulated DC signals to the DC motor. A ... | 04/24/2007 |
| 7117972 | Vibration isolation mount for garage door opener The invention provides a vibration isolation mount for a motorized garage door opener system. The mount includes a substantially planar first mounting plate with apertures configured for mounting to structure inside a garage, and a substantially planar second mounti... | 10/10/2006 |
| 6879122 | Garage door control system and method of operation A method and apparatus for controlling the operation of a garage door opener is disclosed wherein a micro-controller de-energizes a garage door drive motor for a first period when a stop command is received while the garage door drive motor is energized and the gara... | 04/12/2005 |
| 6847287 | Transmitter-receiver control system for an actuator and method A control system for an actuator used to actuate a device. A receiver in the control system receives different transmitter identifiers from multiple transmitters. A central processor coupled to the receiver uses a received transmitter identifier as the address of a ... | 01/25/2005 |
| 6847136 | Vibration isolation system for garage door opener A drive assembly in a motorized door opener includes a motor that is mounted on a mounting structure. At least one vibration isolator is provided between the motor and the mounting structure. The vibration isolator includes a first mounting fastener configured to be... | 01/25/2005 |
| 6753668 | Reduced profile drive assembly for garage door operator and method of assembly A garage door drive assembly for moving a linkage arm connected to a garage door, the assembly being adapted for shipping in a partially assembled condition in at least a box for on-site installation, the assembly has a longitudinally-extending rail with laterally e... | 06/22/2004 |
| 6662499 | Safety beam bracket and method of assembly A mounting system for the safety beam units of a garage door opener, the mounting system having two brackets, each bracket having a base with a circular opening and a support, the supports of both brackets being adjustably coupleable together. The mountin... | 12/16/2003 |
| 4859990 | Electrically programmable transceiver security system and integrated circuit An electrically programmable security system includes a receiver responsive to particular radio frequency signals which include a predetermined digital code encoded on the radio frequency signal. The receiver generates a control signal upon detecting the ... | 08/22/1989 |
| 4794622 | Low power transmitter frequency stabilization An improved miniature hand-held low power transmitter utilizing a surface acoustic wave (SAW) resonator as the control element to establish the carrier frequency of the oscillator. The SAW resonator stabilizes the frequency of the transmitter to within 0.... | 12/27/1988 |
