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.
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| Number | Title | Issue Date |
| 7210353 | Multimedia feature for diagnostic instrumentation A system and method for obtaining hearing ability related data from a subject outputs tones or sounds and monitors the subject's responses to the tones or sounds. An error condition is detected based on the responses, and corrective instructions are automatically de... | 05/01/2007 |
| 7016504 | Personal hearing evaluator A hand-held device includes an audio transducer (i.e., speaker) for delivering acoustic test stimuli to a test subject within the direct sound field range of the device. The device accurately delivers multi-level and multi-frequency test stimuli for the subjective r... | 03/21/2006 |
| 6928856 | Apparatus and methods for interfacing acoustic testing apparatus with acoustic probes and systems Methods and apparatus are provided for testing an acoustic device that has multiple transducing elements adapted for conversion between acoustic and electrical signals. An electrical transmission signal is generated. The electrical transmission signal is transmitted... | 08/16/2005 |
| 6920776 | Apparatus and methods for interfacing acoustic testing apparatus with acoustic probes and systems Methods and apparatus are provided for testing an acoustic device that has multiple transducing elements adapted for conversion between acoustic and electrical signals. An electrical transmission signal is generated. The electrical transmission signal is transmitted... | 07/26/2005 |
