咖啡杯套 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "咖啡杯套" in Chinese language version.

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espacenet.com

How the Coffee Cup Sleeve Was Invented. Smithsonian. [2016-03-05]. （原始内容存档于2022-02-18）.

Sorensen, Jay, United States Patent: 5425497 - Cup holder, June 20, 1995 [2016-03-05], （原始内容存档于2017-09-11）

How the Coffee Cup Sleeve Was Invented. Smithsonian. [2016-03-05]. （原始内容存档于2022-02-18）.
Sorensen, Jay, United States Patent: 5425497 - Cup holder, June 20, 1995 [2016-03-05], （原始内容存档于2017-09-11）