Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4943185 | Combined drainage and waterproofing panel system for subterranean walls A combination drainage and waterproofing system for subterranean walls includes panels which have drain passages on the side thereof adjacent the soil. The front surface of each panel screens against soil entering the passages and the opposite surface of ... | 07/24/1990 |
| 4916941 | Air bleeding system for an automotive engine cooling system instrument module The invention comprises an improvement for an automotive engine cooling testing system wherein a coolant reservoir is connected to the instrument module by means of two quick disconnect fittings; each such fitting is provided with an internally located sh... | 04/17/1990 |
| 4912862 | Backfill machine The invention comprises a mobile backfilling machine wherein raw materials located adjacent an excavated trench are picked up, graded and delivered to the open trench in an order of size grading from finest to coarsest, thereby providing a fine material p... | 04/03/1990 |
| 4867029 | Stringed musical instrument The invention comprises modification of a classical stringed instrument wherein an elevating block is used to make the string angle between the rearward portion of the strings with respect to the bridge of the instrument to be nearly the same as the angle... | 09/19/1989 |
| 4858799 | Three way locking system for a hand gun in a holster A locking mechanism for attachment to a hand gun holster, the locking mechanism having a control of a locked position which prevents removal of the hand gun from its holster and a continuum of unlocked positions with progressively more force required to e... | 08/22/1989 |
| 4850593 | Reduced drag club head for a wood type golf club The invention comprises an improvement in a golf club head of the wood type wherein a sole trough is located so that its root is essentially parallel to the face of the club head and wherein the surface of the trough is flat to convex in planes essentiall... | 07/25/1989 |
| 4820991 | Apparatus for determination of the location of a fault in communications wires An improved instrument for determining the distance to an open fault in a communications line, the instrument taking advantage of the predictable relationship between the current discharge rate in a reference capacitor and resistor and the current dischar... | 04/11/1989 |
| 4802124 | Non-volatile shadow storage cell with reduced tunnel device count for improved reliability A non-volatile storage cell utilizing a single isolation device, preferably of the Fowler-Nordheim tunneling type for each non-volatile cell module and wherein an improved level shifting input/output circuit is incorporated into each such cell.... | 01/31/1989 |
| 4787066 | Non-volatile shadow storage cell with improved level shifting circuit and reduced tunnel device count for improved reliability A non-volatile storage cell utilizing improved level shifting circuitry to charge and discharge at least a single isolation device, preferably of the Fowler-Nordheim tunneling type, wherein such level shifting input/output circuit is fully static providin... | 11/22/1988 |
| 4781401 | Adjustable jack for mounting on a duct bend The invention comprises an economical, adjustable duct section which allows an installer to mount and connect a curved end thereof to an opening in an air duct bend and to adjust the other end to a desired predetermined angle with respect to the horizonta... | 11/01/1988 |
| 4777990 | Automatic shut-off liquid dispensing nozzle A filling nozzle which is releasably secured to a container through which liquid can be dispensed from the container into another receptacle when the nozzle is directed downwardly in a liquid dispensing position. The nozzle contains a butterfly valve for ... | 10/18/1988 |
| 4755750 | Wafer keys for wafer probe alignment The invention comprises a system of alignment key patterns, within the scribe lines of a semiconductor chip, which allow more accurate placement of wafer probes, and more accurate location of fuses for the purposes of blowing selected ones of those fuses ... | 07/05/1988 |
| 4741417 | Apparatus and method for bleeding a hydraulic brake system The invention comprises a method for more efficiently bleeding a hydraulic system of air comprising a method of reversing normal flow of the hydraulic fluid within the hydraulic system, externally recirculating hydraulic fluid from a reservoir at the one ... | 05/03/1988 |
| 4736641 | Self-supporting, trackless, rectilinear load transporter An improved straight line motion gate mechanism which translates gate position to an open/closed position without any perceptible vertical motion and without any moving contact with either the ground or the use of a track. The gate may assume a wide range... | 04/12/1988 |
| 4723799 | Wafer carrier transport system interface The invention comprises a two, three or four short pin engagement system for engaging a wafer carrier for transporting semiconductor wafers by means of a three axis robotic transportation system for the purpose of processing semiconductor wafers in a fact... | 02/09/1988 |
| 4724471 | Electrostatic discharge input protection network An improved input network for MOS semiconductor devices intended to increase the device resistance to electrostatic discharge in the input circuit. A series of features comprising round and concentric round contacts and buried contacts, a layer of polycry... | 02/09/1988 |
| 4720129 | Improved two piece security plate for a door The invention comprises a combination security plate for attachment to a door edge over or in conjunction with a latch set, the security plate providing protection against incursion of a credit card or other light burglary tool directed to the latch or to... | 01/19/1988 |
| 4717845 | TTL compatible CMOS input circuit A TTL compatible CMOS input circuit comprising a series of current mirror circuits arranged so that the input transistor is used to discharge the capacitive load and one of a pair of transistors in one of the current mirror circuits provides charging curr... | 01/05/1988 |
| 4712174 | Method and apparatus for generating text A computer based system for generating text from a predetermined data base, in either prose or poetic form, in response to a plurality of input data provided by an operator in an interactive mode of operation with the computer. The preferred embodiment di... | 12/08/1987 |
| 4629231 | Security plate for a door The invention comprises a combination security plate for attachment to a door edge over or in conjunction with a latch set, the security plate providing protection against incursion of a credit card or other light burglary tool directed to the latch or to... | 12/16/1986 |
| 4628247 | Voltage regulator The invention comprises an improved on-chip voltage regulator which provides output voltages significantly lower than the band gap voltage of silicon with supply voltages as low as 1.0 volt, with the output voltage fully temperature compensated.... | 12/09/1986 |
| 4628214 | Back bias generator The invention comprises an improved back bias generator for an integrated circuit wherein a transistor circuit first acts as an isolation device during the charging phase of a charge pump capacitor and acts as a coupling device during a discharge phase of... | 12/09/1986 |
| 4583776 | Double purpose security plate The invention comprises a design improvement on security plates of the type which are designed to prevent unauthorized entry through a door equipped with a door latch set by means of the use of a credit card or the like. The improvement provides a single ... | 04/22/1986 |
| 4580980 | Denture for reducing the cosmetic effect of facial age lines The invention comprises an improvement to an artificial denture, in the preferred embodiment, which provides support for age line features on the face of the wearer of the denture. The support mechanism comprises protuberances molded into the gum area of ... | 04/08/1986 |
| 4577358 | Bean bag body support The invention comprises an improved bean bag structure with a pattern of internal cups and fasteners installed on or in the bag to control its shape against the forces of gravity and in the face of external forces applied thereto. The bag is useful for pr... | 03/25/1986 |
| 4526091 | Adjustable roof jack The invention comprises an economical, adjustable roof jack for connecting a roof mounted air handler to an air duct therebelow, wherein a single sheet metal pattern comprises a portion of a lower and upper section of duct and wherein the duct sections ar... | 07/02/1985 |
| 4503723 | Gate operator apparatus The invention comprises a gate or other load operator which provides non-linear torque/angular velocity characteristics over approximately a ninety degree gate travel range wherein the torque/velocity characteristic is reversed for opening and closing. Th... | 03/12/1985 |
| 4475759 | Pickup truck having a streamlining tailgate The invention comprises an improvement in pickup truck tailgates and the mechanism for operating such tailgates which allows the tailgate to be operated from essentially a conventional closed vertical position to a plurality of other positions which may p... | 10/09/1984 |
| 4378510 | Miniaturized accelerometer with piezoelectric FET An accelerometer comprising a piezoelectric device hard mounted to the gate electrode of a field effect transistor, thus avoiding the capacitance of an interconnecting coaxial cable connection and providing, therefore, improved frequency response in a sma... | 03/29/1983 |
| 4377398 | Heat energized vapor adsorbent pump A solid matrix of microporous adsorbent is utilized to provide a barrier between two bodies of a gaseous mixture of which at least one constituent is a sorbable vapor. Appropriate application of heat at the opposing interfaces of the adsorbent barrier pro... | 03/22/1983 |
| 4335781 | High power cooler and method thereof A high power cooler for absorbing heat from a high power source such as electronic components is especially applicable to airborne missiles wherein a cold plate is not available and the thermal energy produced by the high power source must be totally abso... | 06/22/1982 |
| 4185243 | Method and apparatus for providing a standby signal The disclosed signal generating apparatus and method is suitable for use in combination with a PM receiver to provide a standby signal for a signal processor. The standby signal system includes a clipper connected to the receiver IF; a coherent amplitude ... | 01/22/1980 |
| 4165952 | Heat energized vapor adsorbent pump A solid matrix of microporous adsorbent is utilized to provide a barrier between two bodies of a gaseous mixture of which at least one constituent is a sorbable vapor. Appropriate application of heat at the opposing interfaces of the adsorbent barrier pro... | 08/28/1979 |
| 4158782 | I2 L interface with external inputs and method thereof Combining a differential PNP transistor pair for receiving external digital signals with an NPN output transistor in an I2 L configuration connected to the output of the differential pair provides a simple, high-speed, and versatile digital log... | 06/19/1979 |
| 4135105 | Locked frequency divider, multiplier and phase shifter A locked frequency divider, multiplier and phase shifter includes a circuitry for controlling the operation of a timer with timing circuitry to operate in an astable mode so that the timer can function as a frequency divider, multiplier or phase shifter.... | 01/16/1979 |
| 4131485 | Solar energy collector and concentrator Modular structures for the collection, concentration and conversion of solar energy to another usable form such as electrical energy. The structures feature three conic section reflective surfaces, two of which focus in front of a receiver element and off... | 12/26/1978 |
| 4118642 | Higher density insulated gate field effect circuit An insulated gate field effect transistor (IGFET) memory or logic circuit is implemented at higher density levels by employing thick oxide IGFET's as load elements. Additionally, the gate electrode structure of the IGFET load devices and their channel len... | 10/03/1978 |
| 4098191 | Passive optical proximity fuze An on board system for determination of slant range to a ground impact point of a ballistic vehicle. The system utilizes two infrared sensors viewing the ground at a very small divergent angle with respect to each other. The off axis displacement angle is... | 07/04/1978 |
| 4090152 | Push-pull oscillator circuit with power combining cavity A high power output push-pull microwave oscillator utilizing a plurality of tuned coaxial circuits each mounting a diode at each of two extremities and each being coupled to an output cavity of resonant frequency, fo, equal to the operating fre... | 05/16/1978 |
| 4075578 | Accumulating cavity microwave oscillator An accumulating cavity microwave oscillator having a plurality of coaxial circuit mounted negative resistance diodes coupled to the cavity wherein the plurality of coaxial circuits may be mounted in concentric circles or in other symmetrical or non-symmet... | 02/21/1978 |
