Building block
Description
Claims
The ornamental design for a building block, as shown.
Patent History
Patent number: D680176
Type: Grant
Filed: Apr 23, 2012
Date of Patent: Apr 16, 2013
Inventor: Taan-Kuan Chin (Taipei)
Primary Examiner: Cynthia M Chin
Application Number: 29/418,854
Type: Grant
Filed: Apr 23, 2012
Date of Patent: Apr 16, 2013
Inventor: Taan-Kuan Chin (Taipei)
Primary Examiner: Cynthia M Chin
Application Number: 29/418,854
Classifications