Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Communications
Class Information
Number: 181/123
Name: Acoustics > Echo system
Description: Subject matter having means for sending out a sound wave and receiving said wave after a reflection being utilized to add some information to the original wave.










Sub-classes under this class:

Class Number Class Name Patents
181/124 Altitude or depth detection 42


Patents under this class:

Patent Number Title Of Patent Date Issued
8220584 Hybrid level measurement system Jul. 17, 2012
5363341 Level measuring device which can be assembled from components Nov. 8, 1994
4945520 Hydro-acoustic device for warning sea mammals Jul. 31, 1990
4943119 Height control device and method for a fixture for machining an object essentially defined by a single plane Jul. 24, 1990
4939703 Transducer baffle and sensor using same Jul. 3, 1990
4796726 Ultrasonic rangefinder Jan. 10, 1989
4750584 Distance measuring device Jun. 14, 1988
4739860 Ultrasonic rangefinder Apr. 26, 1988
4635240 Sonar navigation system Jan. 6, 1987
4326272 Electronic intruder detection system Apr. 20, 1982











 
 
  Recently Added Patents
Detection of code-based malware
Advertising apparatus
Emergency whistle, flashlight, and compass
Porous objects having immobilized encapsulated biomolecules
Support member, rotation device comprising such a support and rolling bearing assembly including such a detection device
Method and system for facilitating micropayments in a financial transaction system
Toy
  Randomly Featured Patents
High-density MOS-decoded unary DAC
High intensity discharge lamp with single crystal sapphire envelope
Optical trap utilizing a reflecting mirror for alignment
Method of making field effect transistor for high-frequency operation
Electroconductive paper coating
Electro-optical transceiver with nonimaging concentrator
Nonreflecting photoresist process
System and method for introducing dither for reducing spurs in digital-to-time converter direct digital synthesis
Transition metal compound and olefin polymerization catalyst component comprising said compound
Electrophoretic device with capacitive storage and applied fluctuating signal, method of driving the same, and electronic apparatus