Assignors: GLADWIN, TIMOTHY A., GRANT, MATTHEW, JOHNSTON, ROBERT G. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Assigned to DEI HEADQUARTER, INC. Original Assignee DEI Headquarters Inc Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Johnston Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active, expires Application number US11/641,446 Other versions US20080144873A1 Google Patents Ceiling or wall-mounted loudspeaker system with anti-diffraction wave launch deviceÄownload PDF Info Publication number US8014545B2 US8014545B2 US11/641,446 US64144606A US8014545B2 US 8014545 B2 US8014545 B2 US 8014545B2 US 64144606 A US64144606 A US 64144606A US 8014545 B2 US8014545 B2 US 8014545B2 Authority US United States Prior art keywords khz frequency angled surface range loudspeaker system Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US8014545B2 - Ceiling or wall-mounted loudspeaker system with anti-diffraction wave launch device US8014545B2 - Ceiling or wall-mounted loudspeaker system with anti-diffraction wave launch device
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