Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Communications
Class Information
Number: 181/247.gtoreq.251
Name: Acoustics >
Description:










Sub-classes under this class:

Class Number Class Name Patents
181/ Speaking tubes 0
181/.5 Miscellaneous 98
181/101 Geophysical or subsurface exploration 51
181/123 Echo system 10
181/125 Sound location 17
181/126 Anatomic or prosthetic relation 27
181/138 Mechanical telephone 6
181/139 Wave generation and detection 30
181/140 With vessel 16
181/141 Combined 150
181/142 Wave generation 62
181/143 Moving sound producer or deflector 13
181/144 Plural diaphragm sound sources 254
181/148 Diaphragm and enclosure 256
181/157 Diaphragm 75
181/175 Sound-modifying means 160
181/30 Auditorium 74
181/400 Wave coupling 19
181/403 Refrigerator compresssor muffler 195
181/404 Hobby craft engine muffler 5


Patents under this class:

Patent Number Title Of Patent Date Issued











 
 
  Recently Added Patents
Sericin cationic nanoparticles for application in products for hair and dyed hair
Single check memory devices and methods
Scoring records for sorting by user-specific weights based on relative importance
Plants and seeds of corn variety CV577261
Cooking device and method of manufacture of the same
Coding circuitry for difference-based data transformation
Method and system for filtering noises in an image scanned by charged particles
  Randomly Featured Patents
Fluidic angle-of-attack sensor
Retractable rear under view mirror system for an automotive vehicle
Golf swing trainer
Method for measuring heart electrophysiology
Convertible coat and tote bag
Scale with digital display of available weight range
Electronic assembly including multiple substrates
Dental gypsum compositions in low-dusting powdery form
Digitizer stylus with Z-axis side pressure control
Open core building blocks system