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 |
| 4911435 | Exercise machinery convertible for use by wheelchair-seated exercisers A variety of selectively variable resistance exercise machines, of the type in which the exerciser is seated while grasping and forcibly moving a hand operable force input portion of the machine, are modified to permit their use by both able bodied and ph... | 03/27/1990 |
