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Class Information
Number: 181/178
Name: Acoustics > Sound-modifying means > Intensifying horn > Collapsible
Description: Subject matter wherein the horn includes means to effect a reduction in size from an operative condition to an inoperative condition, e.g., telescopes or folds.

Patents under this class:

Patent Number Title Of Patent Date Issued
8636102 Voice amplification assembly Jan. 28, 2014
8191673 Collapsible megaphone device Jun. 5, 2012
8028790 Sound projection device attachable to a user when not in use Oct. 4, 2011
7984842 Megaphone popcorn cup Jul. 26, 2011
7530425 Speaker enclosure for a ceiling or wall mounted speaker method and apparatus May. 12, 2009
6889797 Multi-purpose headgear May. 10, 2005
6724904 Microphone mounting assembly Apr. 20, 2004
6625288 Collapsing paraboloid dish and method Sep. 23, 2003
6568504 Multi purpose headgear May. 27, 2003
6480613 Loudspeaker stand Nov. 12, 2002
5967875 Megaphone cup Oct. 19, 1999
5967405 Megaphone cup Oct. 19, 1999
5397866 Dual acoustic horn assembly Mar. 14, 1995
5094317 Two-piece megaphone with ornamental member Mar. 10, 1992
4703829 Collapsible and portable megaphone Nov. 3, 1987
4613012 Article of rolled form Sep. 23, 1986
4058995 Lock de-icer Nov. 22, 1977

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