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Class 73/1.44 - Using antenna or radio frequency (RF)


Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein either (a) the apparatus for proving
No. of patents: 6
Last issue date: 10/03/2006


NumberTitleIssue Date
7116218Vehicle-tire-state detection/communication apparatus and tire-data communication apparatus
A detection/communication apparatus to be installed on a vehicle having a plurality of tires. The apparatus includes: (a) tire state detectors which are provided on the respective tires and each of which detects a state of a corresponding one of the tires; (b) local...
10/03/2006
4494211Balanced system for ranging and synchronization between satellite pairs
A balanced ranging and synchronization (R&S) system for a master(M)-slave satellite pair including a clock, a transmitter, a receiver, a time difference measuring device and a calculating device on both M and S. Each satellite transmits timing signals sy...
01/15/1985
4128003Acoustic couplers for horological calibration instruments
Apparatus is disclosed which is employed to provide an audible sound at a given repetition rate to enable one to test and calibrate a timing mechanism such as a watch which employs a non-audible frequency source, such as a crystal or quartz oscillator. Th...
12/05/1978
4078419Method and apparatus for testing the accuracy of an electronic clock
An electronic clock, such as a quartz-crystal clock, is tested and may be adjusted by measuring the oscillation frequency of the clock with an active antenna. The oscillation frequency is electrically compared with a reference frequency to determine devia...
03/14/1978
4078420Digital watch analyzer
Disclosed is an analyzer for producing a digital display of the rate of deviation of a solid state wristwatch from a predetermined norm. It comprises a counter and calculator into which are gated a series of high frequency pulses for a period of time depe...
03/14/1978
4041767Testing apparatus for use in calibrating wristwatches
Timing apparatus is provided for use in calibrating a wristwatch whose timing accuracy depends on the oscillation frequency of an electrical oscillator in the wristwatch. Electrical energy radiated from the wristwatch is picked up and in response there is...
08/16/1977
 
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