Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 4996697 | Deglitching means for digital communication systems In a digital wireless subscriber telephone unit for wireless connection with a base station which includes a modem processor whose signal is converted to an analog signal which is then upconverted and filtered to form an IF signal, a deglitching circuit f... | 02/26/1991 |
| 4953197 | Combination spatial diversity system A spatial diversity system for digital mobile telephone networks which comprises at least two antennas, one antenna being part of a primary (or master) unit and the other being part of a diversity (or slave) unit, each unit having processing means to dete... | 08/28/1990 |
| 4943983 | Subscriber unit for wireless digital telephone system A digital wireless subscriber telephone unit for wireless connection with a base station. The subscriber unit has a baseband processor which is coupled to storage means for the baseband functions. The baseband processor is direct access coupled to a modem... | 07/24/1990 |
| 4940956 | Band-pass filter and support structure therefor A band pass-band reject filter in which the filter housing which comprises the resonant cavity is contained within an annular wall that is supported at each end by an end plate. The filter is connected to an instrument rack or the like by the distal ends ... | 07/10/1990 |
| 4935927 | Base station emulator A wireless digital telephone system containing at least one emulated base station plus one or more subscriber stations, the emulated base station comprising a station similar to the subscriber station but having the capability of initiating a synchronizat... | 06/19/1990 |
| 4912705 | Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels A system for the wireless transmission of multiple information signals utilizing digital time division circuits between a base station and a plurality of subscriber stations. The subscriber stations may be fixed or movable. The number of time division cir... | 03/27/1990 |
| 4893317 | Digital signals and frequency correction in a digital wireless system A digital wireless subscriber telephone unit for wireless connection with a base station. The subscriber unit has a baseband processor which is coupled to storage device for the baseband functions. The baseband processor is direct access coupled to a mode... | 01/09/1990 |
| 4817089 | Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels A system for the wireless transmission of multiple information signals utilizing digital time division circuits between a base station and a plurality of subscriber stations. The subscriber stations may be fixed or movable. The number of time division cir... | 03/28/1989 |
| 4785450 | Apparatus and method for obtaining frequency agility in digital communication systems In a communication system that comprises a plurality of subscriber stations in RF communication with a base station having multiple sequentially repetitive time slots, each time slot being assigned to a particular subscriber station, means to change eithe... | 11/15/1988 |
| 4693982 | Enzymatically-treated guar gums Aqueous guar gum compositions having a very low content of insolubles, the compositions being formed by impregnating free-flowing solid, particulate guar gum with one or more hydrolytic enzymes and thereafter dissolving the particles of guar gum in water.... | 09/15/1987 |
| 4682654 | Enzymatically-treated guar gums A method of recovering oil from an oil-bearing formation by fractionation, utilizing as oil-recovery means aqueous guar gum compositions having a very low content of insolubles, the compositions being formed by impregnating free-flowing solid, particulate... | 07/28/1987 |
| 4678515 | Foam generating compositions The sodium and/or ammonium salts of a mixture of n-alkyl oxyethylated sulfuric acids in aqueous solution, wherein all the compounds have the same molecular formula CH3 (CH2)x CH2 (OCH2 CH2)... | 07/07/1987 |
| 4676835 | Foam generating compositions The sodium and/or ammonium salts of a mixture of n-alkyl oxyethylated sulfuric acids in aqueous solution, wherein all the compounds have the same molecular formula CH3 (CH2)x CH2 (OCH2 CH2)... | 06/30/1987 |
| 4675863 | Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels A system for the wireless transmission of multiple information signals utilizing digital time division circuits between a base station and a plurality of subscriber stations. The subscriber stations may be fixed or movable. The number of time division cir... | 06/23/1987 |
| 4670083 | Binder for bag pads A binding machine for binding together a stack of individual bags to form a pad of bags by connecting the bags together at corresponding selvage portions adjacent the mouths of the bags, comprising a reciprocable side sealing means and, optionally, a reci... | 06/02/1987 |
| 4644561 | Modem for RF subscriber telephone system A modem including a modulator section for converting a bit stream, wherein each given number of successive bits defines a symbol, into a phase modulated intermediate frequency (IF) signal, the symbols in the modulator section being phase modulated and the... | 02/17/1987 |
| 4632113 | Suture for cardiovascular surgery A surgical suture device comprising a backer in the form of a streamlined bead fixedly connected to opposing ligature strands, the free ends of the ligature strands being connected to surgical needles; the streamlining of the backer eliminating excess sur... | 12/30/1986 |
| 4618370 | Foam generating compositions The sodium and/or ammonium salts of a mixture of n-alkyl oxyethylated sulfuric acids in aqueous solution, wherein all the compounds have the same molecular formula CH3 (CH2)x (OCH2 CH2)y OS... | 10/21/1986 |
| 4594455 | Amine compositions produced by catalytic alkylation of methylamine by long chain alcohols A liquid phase catalytic alkylation of methylamine by long chain fatty alcohols, using as catalyst a mixture of compounds containing nickel, copper, and Group IIA metal, to provide mixtures of monoalkyl, dialkyl and trialkyl amines of preselected ratios, ... | 06/10/1986 |
| 4582264 | Jet-type grinding systems for large particles A jet-type grinding system for grinding relatively large particles, such as coal and the like, wherein the particles to be ground are entrained in a circulating gaseous vortex in which the particles are caused to pulverize each other, the system including... | 04/15/1986 |
| 4580805 | Extendable container chassis for trucks An extendable truck trailer chassis having a movable rear section or extension. The extension is equipped with a gear rack whose teeth are adapted to mesh with teeth of an idler pinion which is mounted on the main frame and is, in turn, in mesh with a sim... | 04/08/1986 |
| 4560068 | Double-pocket pad of bags A pad of plastic bags comprising a plurality of bag units stacked upon one another, each unit comprising two open-mouthed pockets separated by a selvage portion between the open mouths, the open mouth of one pocket being in the reverse plane from the open... | 12/24/1985 |
| 4557384 | Pad of plastic bags A pad of plastic bags comprising a plurality of bag units, each comprising a bag-forming pocket and a selvage portion, the pockets having front and rear walls and sealed edges and the selvage portions being integral with the pockets and also having front ... | 12/10/1985 |
| 4527693 | Box dispenser for pad of plastic bags A plastic bag unit comprising a box having a removable flap covering an aperture in the front wall of the box, and a pad of bags positioned within the box, the pad comprising an upper base portion from which depends a stack of bag-forming pockets having o... | 07/09/1985 |
| 4526324 | Jet-type grinding mill A jet-type grinding mill wherein particles are entrained in a circulating gaseous vortex and caused to pulverize each other during their passage through the mill, the mill having a classifier or separator section wherein there are a pair of coaxial tubula... | 07/02/1985 |
| 4500000 | Pad of plastic bags with support means A pad of plastic open-mouthed pockets overlying each other and separably connected by a common base portion, the base portion being formed of selvage portions extending from the open mouth of the pockets and being secured together at the sides thereof and... | 02/19/1985 |
| 4486195 | Laundering compositions Laundering compositions for cleaning and softening fabrics in either cold or hot water comprising a mixture of effective amounts of a fatty acid amidopropyl dimethylamine and a fatty acid amidopropyl betaine.... | 12/04/1984 |
| 4477357 | Detoxification of substances by utilization of ultrasonic energy Process for detoxifying liquid and perverulant solid material by the application of ultrasonic energy to the material in the presence of an alkaline agent and preferably in the additional presence of a wetting agent.... | 10/16/1984 |
| 4468276 | Bag pad binder A binding machine for binding together a stack of individual bags to form a pad by connecting the bags together at the overlapping selvage portions thereof adjacent their mouths, comprising a vertically movable actuating means having a cutting means and s... | 08/28/1984 |
| 4450174 | Decyl quaternary ammonium compounds Quaternary ammonium salts in which either one or two of the substituents bonded to the quaternary nitrogen is a decyl radical comprising a mixture of primary 10-carbon atom branched chains.... | 05/22/1984 |
| 4446339 | Rotary dial decoder A telephone system for actuating a function-generating device such as ringing a telephone bell, lighting a lamp, reading a meter, and the like, the system being adapted to be directly operated by a pulse-generating means such as a rotary telephone dial.... | 05/01/1984 |
| 4444750 | Method of conditioning hair A method of conditioning hair by applying thereto a quaternary ammonium polymers having formula ##STR1## wherein R' and R" may be the same or different alkyl groups of from 1 to 18 carbon atoms, optionally substituted by from 1 to 2 hydroxyl groups o... | 04/24/1984 |
| 4444790 | Quaternary ammonium disinfectants Decyl dimethylquaternary ammonium salts utilizable as disinfectants in the presence of hard water or organic soil, the term "decyl" referring to a mixture of branched primary branched chain alkyl groups having 10 carbon atoms.... | 04/24/1984 |
| 4439638 | Sound-activated code-controlled detection system for telephones and the like A function generating system such as a telephone ringer, which is sound or voice-controlled in that when the signal is first applied by the caller it results in a series of digits or other sounds emitted by the receiver. The caller follows each of these s... | 03/27/1984 |
| 4425243 | Foaming agents for use in drilling for oil and gas Foaming agents for use in oil and gas production comprising n-octyl dimethylamine oxide, n-decyl dimethylamine oxide, branched decyl dimethylamine oxide, and mixtures thereof, all of which generate copious quantities of stable foam even in the presence of... | 01/10/1984 |
| 4418054 | Polymeric quaternary ammonium compounds for skin care A skin care additive for cosmetic compositions comprising uncapped linear polyquaternary ammonium compounds, the term "uncapped" being used to define those molecules whose termini are capable of further chain propogation.... | 11/29/1983 |
| 4414265 | Insulation board An insulation board comprising a plastic foam layer which is covered by at least one facer, the facer comprising (a) a sheet of glass fibers bonded to each other by a bonding agent, the fibers and bonding agent being coated with a non-wicking agent, where... | 11/08/1983 |
| 4409399 | Process for producing aliphatic amines A process for producing aliphatic amines which comprises reacting an aliphatic alcohol or an aliphatic aldehyde with an aminating agent selected from the group consisting of ammonia, a primary amine and a secondary amine in the liquid phase in the presenc... | 10/11/1983 |
| 4406371 | Self-contained pad of plastic bags A pad of plastic units comprising a plurality of bag pockets overlying each other in layers, each pocket having an open mouth and an extension of its rear wall, there being a score line in the extension defining the edge of the rear wall of the bag when t... | 09/27/1983 |
| 4404404 | Process for producing aliphatic amines A process for producing aliphatic amines which comprises reacting an aliphatic alcohol or an aliphatic aldehyde with an aminating agent selected from the group consisting of ammonia, a primary amine and a secondary amine in the liquid phase in the presenc... | 09/13/1983 |
