Invention Holidays
| Date | Holiday | ||
|---|---|---|---|
February 11 |
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National Inventors Day February 11 | ||
April 6 |
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National Teflon Day April 6 | ||
April 25 |
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National Telephone Day April 25 | ||
April 29 |
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National Zipper Day April 29 | ||
May 27 |
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National Cellophane Tape Day May 27 | ||
May 29 |
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National Paperclip Day May 29 | ||
May 30 |
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Loomis Day May 30 | ||
June 10 |
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National Ballpoint Pen Day June 10 | ||