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 |
| 5825461 | Bellows for optical equipment Bellows (14) for optical equipment comprising a tubular concertina structure of adjustable axial length, the folds of the concertina structure acting as hinges, the structure having portions of laminated construction, a first layer of the construction bei... | 10/20/1998 |
| 4213685 | Folding type photographic camera In a folding type camera, a taking lens is supported by a lens supporting member. The lens supporting member is swung about an axis disposed adjacent to an upper edge of a housing provided in the front face of a camera body and is swingable between a forw... | 07/22/1980 |
| 4181415 | Camera In an instant, self-developing, and folding camera, a built-in flash unit is disabled as long as the camera is folded. According to another aspect, the flash is disabled after each photograph until the feed motor that drives the film during development ha... | 01/01/1980 |
| 4081808 | Erecting linkage and cover assembly for photographic cameras An erecting linkage and cover assembly for collapsible bellows-type cameras having a lens supporting shutter housing movable between erected and closed positions with respect to a camera body. The erecting linkage includes a pair of folding linkage sets c... | 03/28/1978 |
