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...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| D498009 | Night light | 11/02/2004 |
| D497681 | Night light | 10/26/2004 |
| 6796677 | High intensity lamp A high intensity lighting device (2) is provided. The lighting device has a linear light source (4), a reflective member (6), and a translucent region (14). The linear light source and reflective member typically share a common axis. The ... | 09/28/2004 |
| 6711841 | Gas discharge tube cover A display device has a support, a tubular light source, and a cover. The light source is interconnected to the support, and the cover is placed over the light source. The cover is an arc-shaped partially translucent elongated member. The cover is colored to create a... | 03/30/2004 |
| 6570334 | Gas-discharge lamp including a fault protection circuit A gas discharge lamp including a power supply connectable to a load, and an overvoltage-protection-and-ground-fault-interrupt (OVP/GFI) circuit interconnected with the power supply. The OVP/GFI circuit includes an overvoltage-protection (OVP) sub-circuit ... | 05/27/2003 |
| 6570347 | Gas-discharge lamp having brightness control A gas-discharge lamp and method of operating the lamp for controlling the brightness of the lamp. The lamp includes a drive for supplying a varying signal in response to receiving first and second control signals. The method includes establishing a time p... | 05/27/2003 |
| 6495974 | Power supply for brightness control of a gas-discharge tube A power supply connectable to a power source and to a gas-discharge tube. The power supply includes a transformer having a primary winding, a secondary winding, and first and second switches. The switches receive first and second drive signals, respective... | 12/17/2002 |
| 6491412 | LED display An illuminated sign having an LED as a light source as claimed. A housing has a plurality of internal surfaces wherein at least one of the internal surfaces is a translucent surface. A reflective layer covers each of said internal surfaces except the tran... | 12/10/2002 |
| 6445141 | Power supply for gas discharge lamp A power supply for a gas discharge lamp is claimed. An input circuit receives power from a power source. An output transformer having a primary winding and a secondary winding and has a lamp connected in circuit across the secondary winding. First and sec... | 09/03/2002 |
| 6354028 | Rotatable multi-faced sign A multi-sided display includes a frame and a display sign housing having at least two display surfaces. The housing is supported on an extendable-retractable base which rotatably supports the sign. The display sign can be rotated when the support base is ... | 03/12/2002 |
| 6149281 | Neon lighting fixture A neon lighting fixture has a first housing channel member that mounts to a building wall and has side walls terminating in rims on opposite sides of the open side of the member. A second inverted housing channel member has a neon tube supporting wall and... | 11/21/2000 |
| 5992067 | On-site interchangeable neon sign A generally planar base panel member has mounted to its back face a pair of laterally spaced apart chambers whose open fronts are covered by the panel. A pair of electrical receptacles in each chamber are arranged in alignment with apertures in the base p... | 11/30/1999 |
| 5979093 | Changeable information scroll sign module A web tension maintaining roll in a scroll sign module is arranged with its axis parallel to a rotatable second roll, both rolls being arranged for rotation between laterally spaced apart side frame members. For each roll, a short shaft projects from oppo... | 11/09/1999 |
| 5949197 | Apparatus and method for dimming a gas discharge lamp A power supply for a gas discharge lamp includes a converter, a microprocessor switch control circuit, a driver, a switching network having two MOSFET switches, and an output transformer. A cross conduct inhibit circuit is connected in series between the ... | 09/07/1999 |
| 5940999 | Roll sign module unit First and second rolls arranged with their axes parallel to each other and spaced from each other between said side frame members for being driven rotationally to wind an information bearing web on one roll while the web is unwinding from the other roll. ... | 08/24/1999 |
| 5913501 | Adjustable stacker base for retaining stacked articles A stacker base has L-shaped corner members arranged at the corners of a square or rectangle with connector members spanning between them and connected to the corner members to form an enclosure for the lower levels of a stack of articles. The corner and c... | 06/22/1999 |
| 5911496 | Furniture having a neon display A neon tubing display device for creating a free standing table or for using it as an insert in a piece of furniture is characterized as a container member divided into upper and lower chambers by means of a separator plate. A neon tubing configuration is... | 06/15/1999 |
| 5898272 | Cathode for gas discharge lamp The cathode for a gas discharged lamp includes gettering materials which are placed within the interior of the cathode shell. Other components may also be placed inside the cathode for continuous activation. For example, in mercury vapor lamps, a mercury ... | 04/27/1999 |
| 5809677 | Signs and displays having easily interchangeable information panels A sign wherein individual film panels bearing graphical information are interconnected as an uninterrupted web by way of interconnecting plastic zippers. The web, which is composed of a series of film panel transparencies, is wound and unwound from spaced... | 09/22/1998 |
| 5763964 | Distributed neon power supply system A high frequency power supply for distributed luminous tube signage including a master power unit and one or more slave units. The master unit includes a digital oscillator, controller, and electronic switches to induce a switched high frequency waveform ... | 06/09/1998 |
| 5682693 | Roll sign A roll sign has closed loop belts made up of a series of pivotally connected links for the belts to translate parallel to each other and vertically after passing over driven wheels. Grid members having grooved tracks into which menu strips slide for being... | 11/04/1997 |
| 5668444 | Soft-transition FSK dimmer for gaseous luminous tube lights A dimmer oscillator for a high frequency luminous tube power supply including a frequency shiftable high frequency oscillator, a variable duty cycle low frequency oscillator operatively connected to the high frequency oscillator for controlling the high f... | 09/16/1997 |
| 5588238 | Sign comprised of a carrier frame and manually arrangeable modular information grids and pictorials A sign or menu board has a pair of parallel vertical side rails with opposite end portions of upper and lower cross rails joined to the upper and lower end portions of the side rails to form a carrier frame. Each side rail has a track coextensive with its... | 12/31/1996 |
| 5506596 | Reduced tension modular neon sign system A modular neon sign system comprising two or more independent neon or similar luminous tube segments. One or more of the luminous segments are arranged in generally parallel configuration across the remaining tube segments and each such parallel segment i... | 04/09/1996 |
| 5483765 | Device for displaying pictures in sequence Rectangular transparency panels form the sides of triangular units that are lighted from within. A gear train drives the units in synchronism. A base housing has a plurality of parallel aligned round posts projecting upwardly from it. The posts have a bor... | 01/16/1996 |
| 5464178 | Neon tube support A tubular plastic body of a neon tubing support has a bore terminating in a lower opening and in an opposite internally shouldered upper opening. A helical spring is installed in the bore through the lower opening and retained by a plug in the lower openi... | 11/07/1995 |
| 5392546 | Manually changeable displays Two thin sheets of material have slits to define coplanar flaps that are configured and arranged in conformity with segments of a segmental display such as a seven-segment digital display. The layers are superimposed such that corresponding segments are s... | 02/28/1995 |
| 5367224 | High frequency luminous tube power supply having neon-bubble and mercury-migration suppression A low frequency parasitic oscillation suppressor for series, current-fed high frequency luminous tube power supplies. The suppressor incorporates a transformer, the primary of which serves as the conventional series input choke. A parasitic damping resist... | 11/22/1994 |
| 5367225 | High frequency luminous tube power supply having neon-bubble and mercury-migration suppression A high frequency power supply for neon and mercury luminous tubes including means for simultaneously suppressing bubbles formed in neon tubes and for minimizing migration of mercury commonly associated with the use of solid-state luminous tube power suppl... | 11/22/1994 |
| 5355604 | Sign utilizing ambient illumination A sign body has light transmitting side panels for displaying information. The panels are arranged adjacent each other in a relationship that provides a top opening for entry between the panels of light emitted from fluorescent tubes in a light fixture mo... | 10/18/1994 |
| 5349273 | Dimmer and ground fault interruption for solid state neon supply Apparatus for dimming neon tubes and signs in which certain problems associated with high dimming levels (lowered illumination intensities), namely, of tube non-excitation and non-uniform illumination, are eliminated. The apparatus includes a generator fo... | 09/20/1994 |
| 5315776 | Multiple-display sign device A sign in which multiple scenes are presented in sequence is comprised of a plurality of juxtaposed rotationally driven display units that are assembled with triangularly-shaped hollow sleeves whose side panels are constituted by transparencies on each of... | 05/31/1994 |
| 5257762 | Neon tube support having molded spring and method of making the support A unitary helical coil spring assembly is inserted in a tubular body to form a neon tube support. The assembly is molded of plastic using a mold comprised of two planar blocks in each of which there are a series of axially spaced apart recesses configured... | 11/02/1993 |
| 5189343 | High frequency luminous tube power supply having neon-bubble and mercury-migration suppression A high frequency power supply for neon and mercury luminous tubes including means for simultaneously suppressing bubbles formed in neon tubes and for minimizing migration of mercury commonly associated with the use of solid-state luminous tube power suppl... | 02/23/1993 |
| 5122052 | Mold for producing a neon tube support having a molded spring A unitary helical coil spring assembly is inserted in a tubular body to form a neon tube support. The assembly is molded of plastic using a mold comprised of two planar blocks in each of which there are a series of axially spaced apart recesses configured... | 06/16/1992 |
| 5089752 | High frequency luminous tube power supply with ground fault protection A high frequency PWM power supply for luminous tubes including a low power constant frequency, uniform pulse width generator which charges the intrinsic input capacitance of an insulated junction power FET thereby switching a source of DC voltage across t... | 02/18/1992 |
| 5045000 | Neon sign connector A connector is provided for the conductors running between the electrode-containing ends of a neon tube and the high voltage power supply. Two half-shells composed of rigid insulating plastic are joined together to form a housing after the electrical conn... | 09/03/1991 |
| 5003717 | Changeable information scroll sign A sign composed of modules mounted adjacent each other. Each module having laterally spaced apart side wall members and a pair of longitudinally spaced apart parallel rollers mounted between the side wall members for rotating. Opposite end portions of a w... | 04/02/1991 |
