Did You Know...
...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4143941 | Low loss optical data terminal device for multimode fiber guide optical communication systems The active data terminal device employs an array of multiple mode optical fiber guides as input-output devices, each abutted against a flat input-output focal face of an electro-optically active plate provided with opposed deflection modulation electrodes... | 03/13/1979 |
| 4121884 | Optical fiber switch An optical fiber switching arrangement contains a parallel-sided cell arranged within an optical fiber at an angle to the fiber axis. The arrangement includes means for introducing either a liquid or a vapor into the path of light passing through the cell... | 10/24/1978 |
| 4111521 | Semiconductor light reflector/light transmitter A semiconductor device which utilizes interferometric principles and electrical control to provide either light reflection or light transmission or partial light reflection/transmission. In a preferred embodiment, the device includes an input waveguide wh... | 09/05/1978 |
| 4057719 | Fiber optics electro-mechanical light switch An electro-mechanically actuated light switch is provided for transferring ight energy into or out of a fiber optic light transmission path. Liquid material contained within the switch provides a continuity between two fiber optic terminals in the fiber op... | 11/08/1977 |
| 4013342 | Keyboard using optical switching The invention relates to keyboard devices using optical switching and includes novel light distribution means to multiple fiber optics, switching means between fiber optics, and collection means from multiple fiber optics to a single point.... | 03/22/1977 |
| 3937952 | Keyboard and switches for keyboards A switch for use in a keyboard consists of an input light pipe, one or more output light pipes and means selectively operable to cause light to be reflected from the input light pipe into the output light pipes. The output light pipes are preferably conne... | 02/10/1976 |
