Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7886868 | Self-draining grill and system incorporating the same A self-draining grill and system incorporating the same. The grill includes a plurality of ribs extending from a surface of a housing and angled downward in a direction across the surface of the housing. One or more openings are disposed between the ribs and allow a... | 02/15/2011 |
| 7448467 | Acoustic enclosures An acoustic enclosure such as a loudspeaker (10) uses within the cabinet adsorbent material, and/or containment means (22) for the adsorbent material, which is at least partially hydrophobic. Preferably, the material is activated carbon treated to prov... | 11/11/2008 |
| 7364098 | Material dispensing apparatus A device for dispensing coating material includes a handle and a barrel coupled to the handle and extending therefrom toward a forward end from which coating material is dispensed. A first component is provided on the dispensing device. Multiple second components ea... | 04/29/2008 |
| 7360499 | Helmholtz resonator type marine signal A power efficient, acoustical Helmholtz resonator foghorn including a plurality of electrical emitters, some of which are redundant, arrayed at one end of a blocked tube with a plurality of exhaust ports located therein surrounded by a standoff tubular member. The f... | 04/22/2008 |
| 7357217 | Faceplate cover The present invention provides an improved method and apparatus for manufacturing communication devices. A cover is attached to a surface of a faceplate that includes at least one opening, to provide enhanced device protection and sound quality. In one embodiment of... | 04/15/2008 |
| 7341259 | Air seal system for loudspeaker This invention provides an air seal system for loudspeakers where it is desirable to reproduce sound accurately and efficiently without loss in sound quality. The air seal system may include a housing, a baffle, and a cord gasket positioned in a gland to form an air... | 03/11/2008 |
| 7337874 | Lightweight speaker enclosure A speaker enclosure having a substantially seamless rigid outer skin, a middle sound absorbing layer, and a substantially seamless inner skin results in a lightweight speaker having sound absorbing characteristics. The speaker enclosure is comprised of two basic par... | 03/04/2008 |
| 7283640 | Microphone cover The inventive microphone cover for hearing devices for at least partially covering openings (6) arranged at the outside of the hearing device comprises a ring (2) with racks (4) overdrawing the opening of the ring (2). The outer diameter ... | 10/16/2007 |
| 7203329 | Audio speaker system employing an axi-symmetrical horn with wide dispersion angle characteristics over an extended frequency range A speaker system includes a speaker driver loaded by a horn waveguide. The speaker driver reproduces sound within an extended frequency range that includes a high frequency band between 8 kHz and 11 kHz. In the preferred embodiment, the extended frequency range incl... | 04/10/2007 |
| 7093688 | Structure for preventing the generation of standing waves and a method for implementing the same A speaker assembly includes a speaker mounted within a housing having a front plate and a base plate. The speaker is inclined with respect to the front plate. The base plate includes one of an inclined type structure, a convex type structure, a radial rib type struc... | 08/22/2006 |
| 7077290 | Beverage forming and dispensing system A beverage dispensing system includes separate valves for controlling the flow rate of a diluent and a concentrate. Various concentrates of different viscosities can be used and the selected concentrate is identified. The flow rate of the concentrate is determined b... | 07/18/2006 |
| 7039212 | Weather resistant porting A port for a loudspeaker is disclosed which is sufficiently weather resistant for long term outdoor use and which prevents debris, insects and other vermin from entering the loudspeaker and which is compact and efficient. ... | 05/02/2006 |
| 6987860 | Speaker installation structure A speaker mounting structure is provided in which a speaker frame (11) is fixed to a mounting panel (P) by engaging latching hooks (24L, 24R) and a latching clip (26) provided on the speaker frame (11) with mounting holes (22, 2... | 01/17/2006 |
| 6957715 | Garden speaker A sound producing rock having a matching body and a cap such that the cap is supported above the body in a spaced relationship to give the illusion that the cap and body are a monolithic structure. The cap and body are produced by sawing the cap from the body. A cav... | 10/25/2005 |
| 6932187 | Protective acoustic cover assembly A protective acoustic cover assembly including a metal foil with perforations, and a treatment on one or more surfaces of said metal foil. The treatment is a hydrophobic or oleophobic treatment, or both. The protective acoustic cover assembly has an average specific... | 08/23/2005 |
| 6810129 | Waterproof speaker for use in an automobile A damper-mounting wall portion 40 which is provided on a small-diameter end of a trumpet-shape part of a frame 1 so as to extend in a diametrically inward direction is formed with an outside diameter which is larger than a diameter of a damper 8 | 10/26/2004 |
| 6807284 | Speaker and speaker device A speaker has a very small size and is arranged to emit sound waves in a non-directional manner. The speaker includes a case and a speaker unit attached to a plate provided at an opening of the case. The speaker is arranged so that the speaker unit is mounted or att... | 10/19/2004 |
| 6798888 | Mount for underwater acoustic projector A mount for acoustic transducers has a resilient sheet with a plurality of mounting apertures therein. Each mounting aperture has an annular groove formed about the inside surface of the sheet to accommodate one of the acoustic transducers. A pair of rigid, acoustic... | 09/28/2004 |
| 6789642 | Display enclosure having thin speaker The present invention relates to a LCD display that has a thin depth, rigid enclosure and includes a thin speaker so that the depth of the enclosure does not have to be increased to accommodate the speaker. The speaker is used to generate audio output that may corre... | 09/14/2004 |
| 6771787 | Waveguide electroacoustical transducing A waveguide system for radiating sound waves. The system includes a low loss waveguide for transmitting sound waves, having walls are tapered so that said crosssectional area of the exit end is less than the cross-sectional area of the inlet end. In a second aspect ... | 08/03/2004 |
| 6752238 | Water resistant audible toys with sound effects A water resistant audible toy, such as a toy water gun, includes a speaker having a water resistant speaker cone. The water resistant audible toy includes a switch to activate the speaker to generate sounds. The water resistant audible toy may further include a ligh... | 06/22/2004 |
| 6708797 | Display enclosure having thin speaker The present invention relates to a LCD display that has a thin depth, rigid enclosure and includes a thin speaker so that the depth of the enclosure does not have to be increased to accommodate the speaker. The speaker is used to generate audio output that may corre... | 03/23/2004 |
| 6626262 | Waterproof speaker A waterproof speaker has a yoke provided with a magnet and a center pole therein. A top plate is attached on the periphery of the yoke, wherein the center pole protrudes through a center opening of the top plate. A frame is mounted on a front surface of t... | 09/30/2003 |
| 6561311 | Speaker cabinet An improved structure of speaker cabinet comprising a housing opened on one side thereof, and comprising a front panel, wherein, a plurality of intermediate speakers can be held firm and get increased connecting strength when the front panel is integrally... | 05/13/2003 |
| 6438242 | Acoustic transducer panel An electro-acoustic transducer in which a plurality of cymbal-type electro-acoustic actuators are disposed in mechanical and electrical parallel between a pair of stiff plates. The resultant transducer resonates at a lower frequency than the cymbals, with... | 08/20/2002 |
| 6430297 | Speaker and speaker device A speaker has a very small size and is arranged to emit sound waves in a non-directional manner. The speaker includes a case and a speaker unit attached to a plate provided at an opening of the case. The speaker is arranged so that the speaker unit is mou... | 08/06/2002 |
| 6412594 | Water gun with sound effects module A water gun includes a sound effects module. The water gun includes a trigger to squirt water. The trigger actuates a switch coupled to the sound effects module. The sound effects module has an interior volume with a speaker at one end. A speaker cover se... | 07/02/2002 |
| 6321868 | Watertight apparatus capable of being immersed and including an acoustic transducer The present invention concerns a watertight apparatus capable of being immersed in a liquid, for example a watertight watch, including a case (1) with an inner chamber (10) communicating with the exterior, the chamber being separated from the exterior by ... | 11/27/2001 |
| 6298943 | Bass-reflex speaker assembly To provide a bass-reflex speaker assembly having superior water resistance and which can be mounted on a motorcycle, while not being subjected to the influence of negative pressure due to wind during travel and which is capable of maintaining superior sou... | 10/09/2001 |
| 6128394 | Speaker apparatus and waterproof cover therefor In order to reduce the possibility of moisture, which has seeped into a door from its lower side, contacting with a speaker and also of air pressure building up behind the speaker and hindering the movement of the diaphragm, a waterproof cover 3 is provid... | 10/03/2000 |
| 6122390 | Speaker hatchboard The speaker hatchboard (26) allows audio speakers (34 and 36) to be installed in a sailboat (10) or other vessel without drilling holes through any boat surfaces. The speaker hatchboard (26) includes a body (28) dimensioned to be received within the slots... | 09/19/2000 |
| 5802192 | Speaker waterproof structure for electrical equipment Outside an electrical equipment housing having a speaker installed therein is installed a vibratory plate member for externally transmitting vibrations of the speaker as a sound and for preventing intrusion of water from outside the housing, and a plurali... | 09/01/1998 |
| 5306880 | Omnidirectional speaker system An omnidirectional speaker system includes woofer and tweeter speakers mounted in a concave, curved upper fabricated of a relatively hard shell exterior and a foam interior, preferably plastic. Beneath the upper housing is a base, including a generally co... | 04/26/1994 |
| 5105394 | Constrained diaphragm transducer An acoustic source apparatus has a loudspeaker enclosed within a substantly pressure resistant and water tight enclosure. Acoustic energy from the loudspeaker emanates through an opening in the enclosure. This opening is covered by a resilient diaphragm ... | 04/14/1992 |
| 4949806 | Headset for underwater use A headset is provided which includes an inverted cup-shaped housing. The housing contains a rigid membrane which separates the housing into an upper chamber and a lower chamber. An inertial transducer is positioned in the upper chamber secured to the memb... | 08/21/1990 |
| 4949386 | Speaker system A waterproof ground audio speaker apparatus has a speaker housing having a cylindrical sidewall, one open end and a closed end. A hollow cylindrical inner housing has a pair of open ends and is attached to the speaker housing with its walls in a spaced re... | 08/14/1990 |
| 4773502 | Enclosure for loudspeaker systems A hermetically sealed speaker enclosure assembled from pieces that can be shipped economically in compact knocked-down condition. The mating surfaces at the edges and margins of the assembled pieces are hermetically sealed by gaskets clamped therebetween.... | 09/27/1988 |
| 4754852 | Simulated rock speaker assembly A simulated rock speaker cabinet in the form of a natural rock has build-up portions of modeling clay which include a pattern of small diameter holes to form speaker grills at longitudinally spaced positions. A chicken wire ring provides structural reinfo... | 07/05/1988 |
| 4657108 | Constant pressure device A pressure modifying device and method which utilizes a gas or vapor and an adsorbent material to reduce the amplitude of pressure variations in gas or vapor. The technique is applicable to loudspeaker assemblies having a box (2), low frequency loudspeake... | 04/14/1987 |
| 4646872 | Earphone An earphone having a housing, a speaker unit accommodated in the housing and a duct formed in the housing to pass sound emanated from the rear surface of the speaker unit and in which a mesh subjected to water repellent treatment is provided within the du... | 03/03/1987 |
