Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Communications
Class Information
Number: 181/40
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
Method and system for enabling rendering of electronic media content via a secure ad hoc network configuration utilizing a handheld wireless communication device
Thermochromic microparticles, dispersions thereof, and manufacturing method thereof, as well as light-modulating coatings, light-modulating films and light-modulating inks
Communication apparatus, integrated circuit, and communication method
Stable file system
Thermosensitive recording medium
Rotation angle sensor
Multibranched polymer and method for producing the same
  Randomly Featured Patents
Searchable multimedia stream
Electrochemiluminescent enzyme immunoassay
Method for measurement of the surface polarity of inorganic material
Cationically polymerizable compositions containing iron metallolene salt
Film examining with diffuse and specular illumination
Color management system
Standardized and self-contained transformer battery charger assembly
Method for coastal protection
Erythropoietin solution preparation
System and a method for checking lock-step consistency between an in circuit emulation and a microcontroller