Toy building block
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Description
Claims
The ornamental design for a toy building block, as shown and described.
Referenced Cited
U.S. Patent Documents
D213709 | April 1969 | Gala |
D233541 | November 1974 | Christiansen |
D317474 | June 11, 1991 | Olsen |
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Patent History
Patent number: D689956
Type: Grant
Filed: Jan 25, 2012
Date of Patent: Sep 17, 2013
Assignee: Hobbyengine Model Ltd. (Hong Kong)
Inventor: Chi Hang Chan (Kowloon)
Primary Examiner: Cynthia M Chin
Application Number: 29/411,760
Type: Grant
Filed: Jan 25, 2012
Date of Patent: Sep 17, 2013
Assignee: Hobbyengine Model Ltd. (Hong Kong)
Inventor: Chi Hang Chan (Kowloon)
Primary Examiner: Cynthia M Chin
Application Number: 29/411,760
Classifications