Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Communications
Class Information
Number: 181/53
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
Dynamic learning method and adaptive normal behavior profile (NBP) architecture for providing fast protection of enterprise applications
Coupling device having piercing member
Method and structure for image local contrast enhancement
Method and system for modeling a common-language speech recognition, by a computer, under the influence of a plurality of dialects
Inducement of organogenetic tolerance for pancreatic xenotransplant
Mobile communication device monitoring systems and methods
Audio/video program-related hyperlink printer
  Randomly Featured Patents
Compression and baling device
Carbamate compounds and their use as insecticides
Arrangement for suspension of an operator cab on a work machine frame
Game apparatus
Head for conducting heat-exchange fluid to rotating system
Display and circuit for driving a display
Charged-particle beam writing method and charged-particle beam writing apparatus
Deep trench isolation with surface contact to substrate
Gasket apparatus and method
Shoe