Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7651283 | Optical device This invention prevents a degradation in image quality resulting from undesirable reflected light and undesirable transmitted light generated near the ridgeline of the edge portion of an optical element including an aperture blade or an ND filter. The aperture edge ... | 01/26/2010 |
| 7190393 | Camera with improved illuminator An illumination and imaging system is provided with a co-axial illuminator that does not include a beamsplitter. The co-axial illuminator achieves efficiencies substantially in excess of those achieved with a beamsplitter. In one aspect, an optical stop is used to r... | 03/13/2007 |
| 6340252 | Light-quantity controlling device and apparatus using the same A light-quantity controlling device includes a driving source, a first light-quantity controlling member driven by the driving source and having a first elongated opening extending in a direction of movement of the first light-quantity controlling member,... | 01/22/2002 |
| 5302988 | Stereoscopic retinal camera including vertically symmetrical apertures A stereoscopic retinal camera capable of photographing the stereoscopic picture of the fundus by dividing a light beam reflected by the fundus into two light beams and transmitting the two light beam respectively along the light paths of separate image fo... | 04/12/1994 |
