Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7895925 | Clamping device for anchoring a microphone to an instrument A clamping device includes an elongated seat unit and a clamping lever unit which respectively have mated and mating jaw segments to clamp a to-be-clamped part of an instrument, grip and actuating segments confronting each other, and mount and fulcrum segments pivot... | 03/01/2011 |
| D630191 | Microphone shock absorber | 01/04/2011 |
| 7469461 | Method for making a diaphragm unit of a condenser microphone A method for making a diaphragm unit of a condenser microphone includes the steps of: forming a liftoff layer on a substrate; forming an insulator diaphragm film on the liftoff layer; and removing the liftoff layer from the diaphragm film and the substrate so as to ... | 12/30/2008 |
| 7433478 | Microphone pick-up device A microphone pick-up device includes an air chamber unit disposed posteriorly of an annular cap body. A pick-up unit generates an acoustic signal in response to detected sound, and includes a yoke mounted in a front portion of the cap body, a voice coil disposed aro... | 10/07/2008 |
| 7224812 | Condenser microphone and method for making the same A condenser microphone includes a condenser housing defining an inner space therein, and a variable gap condenser enclosed in the condenser housing. The variable gap condenser includes an insulating substrate, a conductive fixed back plate mounted securely on the in... | 05/29/2007 |
| 7203330 | Switching unit for a microphone A switching unit for a microphone includes a slider-mounting member, a slider mounted slidably on the slider-mounting member and having an operating element, and a slider-positioning mechanism mounted on the slider-mounting member and defining an elongated slot for ... | 04/10/2007 |
| 7155024 | Microphone A microphone includes a tubular housing extending along a longitudinal axis, a perforated cover mounted on a front open end of the housing and having a circular cross section along a plane transverse to the longitudinal axis, and a positioning ring sleeved on the pe... | 12/26/2006 |
| 6928178 | Condenser microphone and method for making the same A condenser microphone includes a housing having a bottom wall that is formed with a recess which is defined by a recess-defining wall. A condenser is disposed in the housing, defines a variable gap chamber, and covers the recess. The condenser includes a back plate... | 08/09/2005 |
