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
Baseball player stationery tab
Apparatus, system, and method for non-interruptively updating firmware on a redundant hardware controller
Identifying conceptually related terms in search query results
Phosphor, light emitting apparatus, and liquid crystal display apparatus using the same
Gas sensor with a porous layer that detectably affects a surface lattice resonant condition of a nanoparticle array
Automotive lighting system
RF amplifier with digital filter for polar transmitter
  Randomly Featured Patents
Communication device with two modes of operation
Holding apparatus and method for dispensers of hardenable materials
Fluid separation devices, systems and/or methods using a centrifuge and roller pump
Meat analog compositions
Surface treating apparatus
Collapsible and adjustable gage apparatus
Silica-containing UV-crosslinkable hardcoat coatings comprising urethane acrylates
Stable aqueous polymeric superplasticizer solutions and concrete compositions containing the same
Cathepsin G-inhibiting aptamers
Backlight control for a portable computing device