Portable heat preservation lunch box
Description
Claims
The ornamental design for a portable heat preservation lunch box, as shown and described.
Referenced Cited
U.S. Patent Documents
9414701 | August 16, 2016 | Yen |
20100308039 | December 9, 2010 | Miros |
20110114526 | May 19, 2011 | Neumann |
20160278494 | September 29, 2016 | Churro Monteiro |
Patent History
Patent number: D866268
Type: Grant
Filed: Apr 23, 2018
Date of Patent: Nov 12, 2019
Inventor: Jingtao Tan (Hunan)
Primary Examiner: Terry A Wallace
Application Number: 29/644,963
Type: Grant
Filed: Apr 23, 2018
Date of Patent: Nov 12, 2019
Inventor: Jingtao Tan (Hunan)
Primary Examiner: Terry A Wallace
Application Number: 29/644,963
Classifications
Current U.S. Class:
D7/605;
D7/709