Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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 |
| 5488666 | System for suppressing sound from a flame A system for suppressing sound from a flame comprises a detector for detecting a first signal which emanates from the flame. A photo sensor rapidly detects the noise from the flame. The first signal is inverted to produce a second signal. The second signa... | 01/30/1996 |
| 5220246 | Method and apparatus for transmitting information using arc An information transmission method using arc and apparatus thereof are applied to a loudspeaker and the like having the function of illumination. The information transmission method is characterized in that arc current supplied to an arc generating device... | 06/15/1993 |
| 4482788 | Transducer for the transformation of electrical modulations into vibratory modulations Transducer for the transformation of electrical modulations into vibratory modulations, comprising a needle-shaped discharge electrode, which is embedded, except in the region of its tip, in an electrode holder of substantially cylindrical form, made of a... | 11/13/1984 |
| 4464544 | Corona-effect sound emitter A corona effect sound emitter including a discharge electrode producing corona discharge and surrounded by a spherical counter electrode is partially inserted in a housing which encloses a high frequency generator, modulation transformer and a power suppl... | 08/07/1984 |
| 4460809 | Process and device for converting a periodic LF electric voltage into sound waves A process and a device for converting a periodic LF voltage into sound waves, or vice versa. The electro-acoustic transducer device has two groups of substantially parallel points which are separated by insulating screens. The points of each group are res... | 07/17/1984 |
| 4306120 | Sound emitter Sound emitter comprising a circuit generating an electrical signal at high frequency and high voltage, which is modulated by a low frequency signal which is to be transformed into sound waves, and which is applied to a corona-effect transducer at the inpu... | 12/15/1981 |
