Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 4876592 | System for merchandising and the evaluation of responses to broadcast transmissions A system and method for evaluating responses to broadcast programs, such as television programs, for the selling of merchandise includes a modifiable instructional signal modulated onto a voice signal transmitted concurrently with a television program, or... | 10/24/1989 |
