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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| Application No. | Application Title | Issue Date |
| 20090200101 | Acoustic transducer made of pure beryllium with directed radiation, with a concave-shaped diaphragm, for audio applications, in particular for acoustic enclosures A loudspeaker for acoustic enclosure, in particular a tweeter or a medium-frequency loudspeaker, which consists of a spherical diaphragm with direct radiation, with a front side that is concave in relation to the spool, and onto which is attached at a certain level, for... | 08/13/2009 |
| 20080296086 | DIAPHRAGM SURROUND A surround for supporting a diaphragm used to create acoustic waves includes a rib section extending away from the diaphragm and a membrane section that is supported by the rib section. The membrane section has a thickness in a direction substantially normal to opposing... | 12/04/2008 |
| 20070272475 | Tangential stress reduction system in a loudspeaker suspension A speaker system is provided, including a suspension element having an outer edge and an inner edge. The suspension element, such as a spider or surround, varies in shape along at least a portion of the suspension element to help relieve both the radial and tangential s... | 11/29/2007 |
| 20070102231 | Connecting sheet of paper cone A connecting sheet of a paper cone is provided. After overlapped, the two different surface material layers with different properties are combined together by pressurizing and heating them in a mold, and subsequently are made into an annular connecting sheet which has a... | 05/10/2007 |
| 20060162993 | Suspension and electro-acoustic transducer using the suspension A suspension (1a) includes a plurality of roll sections (1b) each of which has a semicylindrical shape in a cross section. The roll sections (1b) are disposed side by side based on a straight line connecting two points on an inn... | 07/27/2006 |
| 20060113144 | Direct radiation pure beryllium acoustic transducer having a concave membrane , used for audio applications, especially for loudspeaker cabinets A loudspeaker for acoustic enclosure, in particular a tweeter or a medium-frequency loudspeaker, which consists of a spherical diaphragm with direct radiation, with a front side that is concave in relation to the spool, and onto which is attached at a certain level, for... | 06/01/2006 |
| 20060096803 | Loudspeaker having an outer edge A loudspeaker, particularly for use as a guitar loudspeaker, has an undulating lateral extension (18) at the outer edge of the cone-piston (16) and an undulating surround (26) which is bonded to the lateral extension in overlapping relationship ther... | 05/11/2006 |
| 20050257999 | Bobbin integrated type magnesium diaphragm, manufacturing method thereof, and speaker device using the diaphragm In the rolling process, a rolling amount at each time of rolling by a rolling machine is set to 1 μm to 20 μm, and a magnesium substrate is heated by a constant temperature oven and rolled by rollers. Thus, a magnesium sheet of 30 μm to 100 μm is produced. This magn... | 11/24/2005 |
| 20050194203 | Planar speaker edge A complex speaker edge in which the acoustic vibration damping capacity of the speaker edge varies longitudinally around the speaker edge in rough proportion to the radial distance of the instant section of the speaker edge from the center of the source of acoustic vibr... | 09/08/2005 |
| 20050185817 | Tangential stress reduction system in a loudspeaker suspension The invention is a suspension element having an outer edge and an inner edge. The suspension element, such as a spider or surround, varies in shape along at least a portion of the suspension element to help relieve both the radial and tangential stress placed on the sus... | 08/25/2005 |
