IP Library › Granted Patent US 683,327
Granted Patent S1
US 683,327 · App. 29/418,231 · Granted May 28, 2013

Adjustable and convertible audio headphones

Inventor: Christopher Dougherty (Doylestown, PA)
Assignee: The Echo Design Group, Inc.
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Quick Facts
Patent No.
US 683,327
App. No.
29/418,231
Granted
May 28, 2013
Kind
S1
Claims (1)

The ornamental design for adjustable and convertible audio headphones, as shown and described.

Assignments (3)
RELEASE OF SECURITY INTEREST Recorded Apr 29, 2026
From: WELLS FARGO BANK, NATIONAL ASSOCIATION
To: THE ECHO DESIGN GROUP, INC.
Reel/Frame 074519/0604 →
PATENT SECURITY AGREEMENT Recorded Jan 15, 2019
From: THE ECHO DESIGN GROUP, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION
Reel/Frame 048857/0361 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 27, 2013
From: DOUGHERTY, CHRISTOPHER
To: THE ECHO DESIGN GROUP, INC.
Reel/Frame 030094/0835 →