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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 7418104 | Speaker system A speaker system having a first speaker, a second speaker, and a housing having a first mounting surface to which the first speaker is mounted and a second mounting surface to which the second speaker is mounted. The first mounting surface and the second mounting su... | 08/26/2008 |
| 7360626 | Audio speaker with wobble free voice coil movement A speaker that is designed to substantially eliminate wobble of the voice coil during operation, and thus remove that source of distortion and early failure of the speaker. This is accomplished with the creation of triangular ring that extends upward from the top ed... | 04/22/2008 |
| 7350618 | Multimedia speaker product A satellite speaker system includes a side firing low mid driver mounted in a sub-enclosure which is vented into a second sub-enclosure through an acoustic resistance vent and to a third sub-enclosure through a variable aperture second vent. The vents further serve ... | 04/01/2008 |
| 7333626 | Arbitrary coverage angle sound integrator A system is disclosed for changing a coverage angle of sound produced from a loudspeaker system. The loudspeaker system includes an enclosure that projects sound at a predetermined angle. A sound integrator includes an inner surface positioned adjacent to a mid-rang... | 02/19/2008 |
| 7237648 | Surround sound positioning tower system and method A surround sound system and method involving a surround sound tower (10) having planar speakers (11b); a base plate (20); and a structure for positioning (30) the surround sound tower on the base plate (20), the surround sou... | 07/03/2007 |
| 7225895 | Audio speaker with wobble free voice coil movement A speaker that is designed to substantially eliminate wobble of the voice coil during operation, and thus remove that source of distortion and early failure of the speaker. This is accomplished with the creation of triangular ring that extends upward from the top ed... | 06/05/2007 |
| 7185735 | Audio speaker with wobble free voice coil movement A speaker that is designed to substantially eliminate wobble of the voice coil during operation, and thus remove that source of distortion and early failure of the speaker. This is accomplished with the creation of triangular ring that extends upward from the top ed... | 03/06/2007 |
| 7134523 | System for integrating mid-range and high-frequency acoustic sources in multi-way loudspeakers This invention provides a radiation boundary integrator (“RBI”) for integrating sound radiation from mid-range and high-frequency sources in multi-way loudspeakers. The RBI is a substantially solid boundary that is placed over the mid-range speakers to provide s... | 11/14/2006 |
| 7096995 | Polyurethane foam cabinets The invention provides a loudspeaker system having a housing made of a plastic casing and a foam positioned against the interior walls of the casing through a reaction between the foam and the interior wall. The foam increases the stiffness of the walls as well as p... | 08/29/2006 |
| 7090047 | Surround sound positioning tower system and method A surround sound system and method involving a surround sound tower; a base plate; and a structure for positioning the surround sound tower on the base plate, the surround sound tower being mounted on, and normal to, the positioning structure for customizing sound d... | 08/15/2006 |
| 7077236 | Articulating vehicle speaker assembly An articulating speaker assembly for the interior of a motor vehicle, which includes sidewall trim defining a pocket in the trim, includes a housing and at least one speaker operatively supported within the housing. The assembly includes at least one pivot arm havin... | 07/18/2006 |
| 6926116 | Speaker mounted in recreational vehicle An apparatus comprises a speaker for use with a recreational vehicle. The speaker is supported relative to the ceiling so as to extend through an aperture in the ceiling. The speaker has a central axis that is oblique relative to a lower surface of the ceiling. ... | 08/09/2005 |
| 6910549 | Embedded multimedia speaker structure An embedded multimedia speaker structure includes a five-facet housing having a same dimension as that of a 5-and-¼-inch disk drive; a recess disposed at a bottom center portion of the housing; a bass speaker disposed at the recess and having a bell thereof facing ... | 06/28/2005 |
| 6118883 | System for controlling low frequency acoustical directivity patterns and minimizing directivity discontinuities during frequency transitions An improved loudspeaker system which increases low frequency directivity and minimizes directivity discontinuities during frequency transitions includes a first low frequency transducer, a second low frequency transducer, a middle frequency transducer ass... | 09/12/2000 |
| 6057659 | Speaker apparatus A miniaturized speaker apparatus including a cabinet to which a first speaker unit for reproducing a low frequency range is installed; second speaker units for reproducing a medium frequency range and/or a high frequency range; and supporting members for ... | 05/02/2000 |
| 5874695 | Speaker assembly A speaker assembly is disclosed. The speaker assembly employs a unique design permitting reduction in the size and weight of the speaker assembly, while maintaining high fidelity sound. The speaker incorporates inverted midranges, with opposed tweeters to... | 02/23/1999 |
| 5847331 | Omnidirectional loudspeaker A speaker propagating sound waves in the manner of a point source. The speaker includes high, medium, and low range drivers vertically arranged within a vertically arranged tubular support member having sound escape openings in its lateral wall. The high ... | 12/08/1998 |
| 5802191 | Loudspeakers, systems, and components thereof Improved loudspeakers, systems and components are adapted to interconnect with many forms of communication media. In one embodiment, a speaker is mountable within a receptacle. The speaker includes a magnetic driver and a diaphragm mounted to a frame. The... | 09/01/1998 |
| 5715322 | Throat device interconnecting a plurality of drive units and a horn A throat device for interconnecting at least two drive units and a horn is provided. The throat device comprises a substantially straight body member having one end to be coupled with the horn, and at least two curved branch members coupled with the other... | 02/03/1998 |
| 5594804 | Multiple cone type loudspeaker A multiple cone type loudspeaker having a construction including a plurality of vibrating plates and a plurality of baffle plates protruded forwards from an enclosure of the loudspeaker. Each of the baffle plates serves to effectively isolate both spaces ... | 01/14/1997 |
| 5590214 | Vertical array type speaker system The efficiency of a vertical array speaker device is raised to obtain an adequate level of sound and to confine the horizontal radiation of the listening area of a surround sound system. A pair of baffle boards are mounted to a vertical array (4) with sma... | 12/31/1996 |
| 5553149 | Theater sound for multimedia workstations A sound reproduction system is disclosed that uses a single pair of compact speaker enclosures to provide surround sound for a multimedia computer workstation. A pair of stereo speaker enclosures provide the computer screen's monaural center channel to a ... | 09/03/1996 |
| 5374124 | Multi-compound isobarik loudspeaker system A loudspeaker system overcomes disadvantages of prior art systems. To adjust for undesirable room acoustics, high frequency slope compensation is provided which reaches its plateau well beyond the highest audible frequency, providing a more accurate audio... | 12/20/1994 |
| 5324896 | Audio loudspeaker system An audio loudspeaker system is provided which consists of an enclosure having a front wall, a rear wall with a plurality of circular openings, a pair of side wall, a top wall and a bottom wall. A plurality of loudspeaker components are supported on the fr... | 06/28/1994 |
| 5307418 | Center channel speaker having multiple interconnected backload amplifying chambers for surround sound stereo audio systems The present invention is a multi-chamber two-way center channel speaker for an audio system which has four stereo surround sound channels including a right front channel, a left front channel, a rear surround channel and a center channel. The preferred em... | 04/26/1994 |
| 5258584 | Multiple auxiliary compound driver loudspeaker system A compound driver loudspeaker system combines a single exterior radiating loudspeaker with a plurality of internal auxiliary loudspeakers in a cabinet. The cabinet has an external baffleboard and an internal baffleboard, the external baffleboard having a ... | 11/02/1993 |
| 5222145 | Dual-chamber multi-channel speaker for surround sound stereo audio systems The present invention is a dual-chamber multi-channel speaker for an audio system which has four stereo surround sound channels including a right front channel, a left front channel, a rear surround channel and a center channel. The preferred embodiment o... | 06/22/1993 |
| 5164549 | Sonic wave generator A sonic wave generator includes at least one pair of concave acoustic baffles arranged in concavely facing relationship in mutual coaxial alignment. The facing acoustic baffles of the pair are spaced apart from each other by a predetermined distance so th... | 11/17/1992 |
| 5000286 | Modular loudspeaker system A modular loudspeaker system of uniformly sized and shaped loudspeaker modules permits hanging of a plurality of the modules in a wide variety of desired configurations. Each module has a pair of side walls with recessed upper and lower marginal edge port... | 03/19/1991 |
| 4991687 | Speaker system having directivity A speaker system comprises a pair of speakers for a higher frequency range and a pair of speakers for a lower frequency range. The speakers for the lower range are disposed with a space d1 equal to the wavelength λc of a division fr... | 02/12/1991 |
| 4940108 | Open line source speaker system An open line source speaker system includes a first columnar cabinet enclosing a plurality of midrange or woofer speakers arranged in the cabinet in a vertical line and a second columnar cabinet enclosing a plurality of tweeters arranged in the cabinet in... | 07/10/1990 |
| 4923031 | High output loudspeaker system A loudspeaker with a pair of speaker units and a manifold chamber between the speaker units for combining the sound from both speaker units. The manifold chamber is formed by walls having an exit opening and a pair of rectangular apertures, the apertures ... | 05/08/1990 |
| 4890689 | Omnidirectional speaker system An omnidirectional speaker unit includes a housing having a plurality of twelve identical sides each having a speaker mounted therein and equally spaced around and directed outward from a common point with all speakers connected to operate in unison to pr... | 01/02/1990 |
| 4884655 | Tower-type speaker cabinet with pivoted plural speaker subassembly A tower-type speaker cabinet assembly for plural speakers of a high fidelity audio system, including a vertically elongated tower cabinet having a pair of front wall segments adjacent the uppermost and lowermost ends of the tower speaker cabinet and an in... | 12/05/1989 |
| 4869340 | Very high performance loudspeaker enclosures Going inwardly from the outside, the walls of the housing comprise a multi-ply slab, one or more layers of elastomer coating, a plate of amorphous bitumen, and acoustic screens constituted by substantially contiguous parallel tubes which are filled with a... | 09/26/1989 |
| 4836326 | Optimal shadow omniphonic microphone and loudspeaker system The invention comprises a microphone and loud speaker system in which the components include a cylinder having a center section and an end section at each end of the center section in axial alignment with one another. The adjacent ends of the center and e... | 06/06/1989 |
| 4792978 | Planar loudspeaker system A planar loudspeaker system having an elongated and substantially planar enclosure, configured to house tweeter, midrange, and a pair of upper and lower woofer diaphragms in its median, longitudinal section. A pair of woofer labyrinths, acting as quarter-... | 12/20/1988 |
| 4787472 | Audio speaker apparatus Audio speaker apparatus includes a chamber portion, a sound generating portion, a sound distributing portion and a positioning portion. The chamber portion includes a generally transverse face section with a housing section extending from adjacent the per... | 11/29/1988 |
| 4733749 | High output loudspeaker for low frequency reproduction A loudspeaker system for low frequencies has a manifold chamber into which oppositely mounted and aligned woofer units radiate sound. The chamber radiates the sound perpendicularly to the woofer axes, either directly into space or into a horn. An addition... | 03/29/1988 |
| 4730694 | Electro-mechanical reproduction of sound A singular configuration for a high fidelity sound speaker enclosure is disclosed. This acoustical structure is formed in two joined sections: the upper section which generally forms a four sided truncated pyramid and the lower section which generally for... | 03/15/1988 |
