(19)
(11) EP 1 846 915 A2

(12)

(43) Date of publication:
24.10.2007 Bulletin 2007/43

(21) Application number: 06720258.0

(22) Date of filing: 03.02.2006
(51) International Patent Classification (IPC): 
G10D 13/04(2006.01)
(86) International application number:
PCT/US2006/003938
(87) International publication number:
WO 2006/084181 (10.08.2006 Gazette 2006/32)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 04.02.2005 US 593691 P
02.12.2005 US 244051

(71) Applicant: Lerner, Robert
North Bay Village FL 33141 (US)

(72) Inventor:
  • Lerner, Robert
    North Bay Village FL 33141 (US)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät 
Maximilianstrasse 58
80538 München
80538 München (DE)

   


(54) DRUM STRUCTURES HAVING TURN-ON DRUMHEAD TUNING AND SPHERICAL ACOUSTIC CHAMBERS