Digital protractor
Description
Claims
The ornamental design for a digital protractor, as shown and described.
Referenced Cited
U.S. Patent Documents
D335634 | May 18, 1993 | Yau |
7204030 | April 17, 2007 | Kattar |
D562709 | February 26, 2008 | Sterpka et al. |
20090064516 | March 12, 2009 | Diaz et al. |
Patent History
Patent number: D610477
Type: Grant
Filed: Feb 13, 2009
Date of Patent: Feb 23, 2010
Inventors: Guangjin Li (Guilin), Changsong Jiang (Guilin)
Primary Examiner: Antoine D. Davis
Attorney: Matthias Scholl P.C.
Application Number: 29/332,406
Type: Grant
Filed: Feb 13, 2009
Date of Patent: Feb 23, 2010
Inventors: Guangjin Li (Guilin), Changsong Jiang (Guilin)
Primary Examiner: Antoine D. Davis
Attorney: Matthias Scholl P.C.
Application Number: 29/332,406
Classifications