Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 6103404 | Laser textured magnetic disk comprising NiNb A method for manufacturing a magnetic disk comprises the steps of depositing NiP (20) on a substrate (22); depositing NiNb (24) on the NiP; and laser texturing the NiNb. "Sombrero" shaped texture features are more easily formed on the substrate/NiP/NiNb s... | 08/15/2000 |
| 6068891 | Method for laser texturing a glass ceramic substrate and the resulting substrate A method for texturing a glass ceramic substrate comprising the steps of applying a laser pulse to the substrate such that a portion of said substrate is heated to a temperature higher than the glass transition temperature of the glass phase of said subst... | 05/30/2000 |
| 6033766 | Gray scale mask and depth pattern transfer technique using inorganic chalcogenide glass A method of producing a high resolution expanded analog gray scale mask is described. Using an inorganic chalcogenide glass, such as a selenium germanium, coated with a thin layer of silver, a gray scale mask may be produced with accurate control of the s... | 03/07/2000 |
| 5998066 | Gray scale mask and depth pattern transfer technique using inorganic chalcogenide glass A method of producing a high resolution expanded analog gray scale mask is described. Using an inorganic chalcogenide glass, such as a selenium germanium, coated with a thin layer of silver, a gray scale mask may be produced with accurate control of the s... | 12/07/1999 |
| 4780707 | Analog input device for a computer An improved mouse includes a stylus and a base. Transducers in the stylus detect motion of the mouse relative to a surface. In this way, the stylus can be used as a pen-shape mouse or inserted into the base, which can then be operated as a more convention... | 10/25/1988 |
| 4758746 | Programmable logic array with added array of gates and added output routing flexibility A programmable logic array (100) includes a set of input terms which are programmably coupled to a first set of AND gates (102-1) through 102-66). The output signals from the first set of AND gates are programambly electrically connected to a second set o... | 07/19/1988 |
| 4707909 | Manufacture of trimmable high value polycrystalline silicon resistors A process of providing semi-insulating thin film resistors with closer tolerance values by furnance-annealing the film to increase is resistance to less than the final intended value, and then focused heat source-annealing the film to within a close toler... | 11/24/1987 |
| 4701057 | Linear motion rolling contact bearing assembly A linear motion rolling contact bearing assembly includes a slider unit having a main body, in which a pair of endless circulating paths for rolling members is formed, and a U-shaped frame, and having a rail extending over a predetermined length and havin... | 10/20/1987 |
| 4701058 | Stopper mechanism of a linear motion rolling contact bearing assembly A linear motion rolling contact bearing assembly including a rail, a slider and a plurality of rolling members interposed between the rail and the slider for providing a rolling contact therebetween is provided. The rail includes a bottom wall and a pair ... | 10/20/1987 |
| 4698617 | ROM Protection scheme The present apparatus provides for the encoding of data carried on bus lines running between integrated circuits in order to protect the data carried upon those bus lines, with encoding and decoding circuits included for providing those functions in regar... | 10/06/1987 |
| 4677391 | Series biasing scheme for field effect transistors A series biasing arrangement for a pair of junction field effect transistors (JFETs), which may be used in RF amplifiers, mixers or oscillators, comprises connecting the JFETs together in series, with the gates of the two JFETs selectively connected to di... | 06/30/1987 |
| 4659531 | Method and apparatus for manufacturing a hollow plastic product A method and apparatus for manufacturing a hollow plastic product is provided. In accordance with one aspect, into a mold half having a tubular groove portion and a projecting groove portion which projects outwardly from the tubular groove section is supp... | 04/21/1987 |
| 4645953 | Current source which saves power in programmable logic array circuitry A current source for powering programmable arrays which provides means of eliminating the current supplied to portions of the array which are unimportant to the boolean arithmetic equation which the programmable array is programmed to model. The circuit i... | 02/24/1987 |
| 4646269 | Multiple programmable initialize words in a programmable read only memory A programmable read-only memory (40) is provided which is capable of storing a plurality of initialize words. The memory includes an initialize input lead (9) and appropriate addressing circuitry (7) so that when the appropriate initialize input signal is... | 02/24/1987 |
| 4644504 | Programmable CMOS circuit for user defined chip enable and output enable A circuit constructed in accordance with this invention is described which includes a programmable chip enable-output enable buffer (11-X). The chip enable-output enable buffer may be programmed to provide a chip enable function in response to a logical 1... | 02/17/1987 |
| 4638189 | Fast and gate with programmable output polarity The present invention combines in either a logical AND function of N logical input signals, where N is a selected positive integer greater than or equal to 1, and provides programmably, either a direct AND output signal or a NAND output signal. The invent... | 01/20/1987 |
| 4636721 | Method and structure for testing high voltage circuits A unique method and structure is provided for testing high voltage equipment with great accuracy of voltage levels to be measured, repeatability of measured levels from one piece of test equipment to the next, no need for recalibration of test equipment, ... | 01/13/1987 |
| 4635002 | Metal oxide semiconductor logarithmic voltage controlled oscillator Voltage controlled oscillator (50) provides an exponential transfer function. The frequency of the output signal of the voltage controlled oscillator varies exponentially with the input voltages (VIN1, VIN2) to the oscillator. The ex... | 01/06/1987 |
| 4634898 | TTL buffer circuit incorporating active pull-down transistor A unique double inversion buffer has a first means to invert and isolate the digital input signal, a second means to reinvert and further isolate the input signal, and an output means including an output transistor 94. The double inversion buffer is confi... | 01/06/1987 |
| 4633220 | Decoder using pass-transistor networks A matrix comprised of pass transistor cells (81 through 96) forms an address decoder circuit (80). By using pass transistor cells in a matrix format, a decoder which consumes a minimum of power and which may be constructed using a minimum of allotted spac... | 12/30/1986 |
| 4631248 | Method for forming an electrical contact in an integrated circuit A contact (15) formed in accordance with the present invention includes rounded corners on the upper and lower surface and sloped walls in the dielectric material (10) in which the contact is formed. In one embodiment, a photolithographic mask is formed a... | 12/23/1986 |
| 4631429 | High voltage compressing input buffer A circuit (40) is capable of receiving a very high voltage input signal, for example from a piezoelectric transducer (1). The circuit accepts the relatively large input voltage of the piezoelectric transducer (1) and provides an output signal proportional... | 12/23/1986 |
| 4629528 | Labeling machine A roll labeler for labeling containers one by one automatically is provided. A label sheet is supplied as uncoiled from a roll over a predetermined length and the label sheet is cut by a cutter thereby producing a cut sheet of label which is then glued wh... | 12/16/1986 |
| 4625295 | Textual comparison system for locating desired character strings and delimiter characters A text comparator receives data stored in a mass storage device. The text comparator includes word logic, delimiter logic, set logic, set combination logic, proximity logic, and programming logic. The delimiter logic serves to monitor the characters trans... | 11/25/1986 |
| 4617571 | Tuned band-switching loop antenna The invention relates to a loop antenna tuned by means of a variable capacitor. The antenna includes, in parallel with the variable capacitor (4), a switchable state variable inductor (11). The invention is particularly applicable to antennas for HF radio link... | 10/14/1986 |
| 4616885 | Dust-free rolling-contact bearing assembly A dust-free linear motion rolling-contact bearing assembly includes a track rail having a generally U-shaped cross section, a table having a generally inverted U-shaped cross section and received in the track rail and a plurality of rolling members interp... | 10/14/1986 |
| 4616466 | Capping apparatus A capping apparatus includes a turn table which is supported to be rotatable and provided with a plurality of container holders for temporarily holding the containers securely, a plurality of cap holders for releasably holding caps to be screwed onto the ... | 10/14/1986 |
| 4609998 | High conductance circuit for programmable integrated circuit A unique programming circuit, suitable for use with programmable read-only memories (PROM), or other circuits utilizing programmable fuses, is provided which overcomes several distinct disadvantages of prior art programming circuits. The programming circu... | 09/02/1986 |
| 4596954 | Frequency doubler with fifty percent duty cycle output signal A unique frequency doubler circuit is utilized which requires only a handful of standard components such as operational amplifier, logic gates, resistors, capacitors and switches. In contrast to certain prior art frequency doublers, frequency doublers con... | 06/24/1986 |
| 4590440 | Phase locked loop with high and/or low frequency limit detectors for preventing false lock on harmonics A phase locked loop circuit (16) includes means to eliminate harmonic frequency locking. The phase locked loop includes a voltage controlled oscillator (1) which provides an output signal (Vout) which is compared with the input signal (Vin... | 05/20/1986 |
| 4580065 | Single-shot circuit having process independent duty cycle A single-shot circuit is fabricated as an integrated circuit except for a single capacitor requiring a single pin to connect to the on-chip circuitry. The single-shot is rendered independent of process variations and operating conditions by incorporating ... | 04/01/1986 |
| 4555668 | Gain amplifier A novel switched capacitor gain stage uses a unique circuit design and clocking technique that reduces the component mismatch offset voltage and the clock-induced feedthrough offset voltage produced by the circuit. The total capacitance ratio between the ... | 11/26/1985 |
| 4541103 | Digitally controlled syllabic filter for a delta modulator A unique CVSD CODEC is provided utilizing switched capacitor technology. This CVSD CODEC includes a syllabic filter which provides one of a large number of possible step sizes, thereby allowing the CVSD CODEC to accurately track and convert a wide range o... | 09/10/1985 |
| 4533876 | Differential operational amplifier with common mode feedback A differential operational amplifier is provided with a feedback loop which continuously adjusts the common mode voltage level of the amplifier so that it lies in the center of the dynamic range of the amplifier. The feedback loop measures the instantaneo... | 08/06/1985 |
| 4459578 | Finger control joystick utilizing Hall effect Hall effect elements are placed in proximity to magnets in such a way that the position of the magnets relative to the Hall elements is a function of the position of a joystick controller. In this way, the position of the joystick can be "read" by a machi... | 07/10/1984 |
