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...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.

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Patents Published on 04/23/1991


See All Patents Issued In 1991


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NumberTitleIssue Date
5009202Electromagnetically operated valve assembly for use in internal combustion engine
An electromagnetically operated valve assembly for use in an internal combustion engine includes a valve, serving as an intake or exhaust valve, made of a ceramic material for reduced weight and good response in operation. The valve assembly also includes...
04/23/1991
5009203Control method for valve-timing changeover in engine
A control method for a valve-timing changeover in an engine having a valve operating mechanism capable of operating the intake valves or exhaust valves, or both, in a different manner, known as valve timing, such as the magnitude of valve lift or the dura...
04/23/1991
5009204Spark plug arrangement in an overhead camshaft engine
An overhead camshaft engine has a cylinder head, two intake valves and two exhaust valves at each cylinder. A plug hole is formed in a space of a cylinder head between the intake valves and between the intake valves and a camshaft. An end of the plug hole...
04/23/1991
5009205Crankshaft supporting structure for an internal combustion engine
A crankshaft supporting device for a multi-cylinder engine including a plurality of bulkheads provided in a cylinder block of the engine to be arranged along an axis of the crankshaft, disposed in a lower part of the cylinder block. A bearing cap member h...
04/23/1991
5009206Rotary internal combustion engine
A rotary internal combustion engine which comprises a housing containing an axle, a pair of toroidal casings both disposed in parallel within the housing, the toroidal casings containing a rotor with a piston disposed within the casings, respectively, an ...
04/23/1991
5009207Internal combustion engine
An internal combustion engine has a pair of first and second cylinders (12,14) communicating with a combustion chamber (20) the first cylinder having a larger swept volume than the second cylinder. First and second pistons (16,18) are provided in the cyli...
04/23/1991
5009208Engine speed limiter
An engine speed limiter includes a computing means for computing a value that is functionally related to the time between successive ignition pulses and for outputting a speed signal representative thereof. The speed limiter also includes generating means...
04/23/1991
5009209Ignition timing control circuit for an internal combustion engine
An ignition timing control circuit for an internal combustion engine of a ring gear tooth counting type includes a throttle sensor for sensing the load condition of the engine and generating an output voltage representative of the sensed load condition, a...
04/23/1991
5009210Air/fuel ratio feedback control system for lean combustion engine
The invention relates to a control systems for feedback control of the air/fuel ratio in an internal combustion engine, e.g., an automotive engine, which uses a three-way catalyst to purify the exhaust gas, by using an exhaust sensor to detect actual valu...
04/23/1991
5009211Fuel injection controlling device for two-cycle engine
A fuel injection controlling device for a two-cycle engine includes an electronic fuel injection system having a fuel injection quantity determining device for determining a fuel injection amount in response to rotational speed and throttle opening of the...
04/23/1991
5009212Port fuel injection and induction system for internal combustion engine
An air fuel injection system for an internal combustion engine includes a plurality of fuel injectors supplied with fuel from a common fuel supply and supplied with air for producing a fuel spray pattern immediately upstream of an inlet valve to the combu...
04/23/1991
5009213Static ignition device for internal combustion engines
The device essentially comprises an auxiliary coil for storing the ignition energy, and a transformer for each spark plug. It is thus possible to prepolarize each transformer in the proper sequence with a current opposite that applied during discharge, wh...
04/23/1991
5009214Holding and release mechanism
A holding and release mechanism for a flexible line or a rigid rod, particularly a bow string release mechanism for use in drawing a bow string back and releasing the same to propel an arrow to the target. The mechanism comprises dual yoke arms slotted to...
04/23/1991
5009215Arrow rest and holder apparatus
An archery bow rest shelf portion amounts brackets having upper and lower horizontal arms that respectively mount an arrow holder and an arm rest device for pivotal movement between generally vertical extending positions for engaging opposite sides of the...
04/23/1991
5009216Bow draw stop
A draw stopping device comprising a plurality of straps which are attachable to a bow on one end to an archer's wrist on the other end....
04/23/1991
5009217Fireplace log holder and alarm
A fireplace log holder and alarm system is designed for placement within the firebox of fireplaces. The log holder is comprised of parallel log supports having a very rough top surfaces so as to minimize rolling and slippage of the logs. Attached to the f...
04/23/1991
5009218Heat-insulating building and/or light element
A building and/or light element includes at least two parallel wall elements (1) between which support elements (2) for the formation of an evacuated interspace (3) are placed and are connected by a flexible seal on the edge. The distance between the wall...
04/23/1991
5009219Heating device
The invention relates to a heating device. A first object of the invention is to embody a heating device with a combustion space having at least one free side, such as an open hearth, or optionally a free-standing heater, such that it possesses a high yield. ...
04/23/1991
5009220Safety enclosure for coal, gas or wood-burning fireplace
A reduced clearance system, or heat shield, for a coal, gas or wood burning fireplace having a cast iron surround, a hood and a grate, said heat shield including a sheet metal box, preferably a double wall sheet metal box with insulation between the wall ...
04/23/1991
5009221Adjustable lintel extension for a fireplace
A pre-built fireplace has a housing with an outlet for combustion gases and an open front for viewing the inside of the fireplace. A hinged damper and a hinged lintel extension are suspended from the inside of the fireplace. The damper and lintel extensio...
04/23/1991
5009222Diving case massager
A diving case massager for convenient carriage with oneself by hanging on one's belt, which is including a water-tight casing having an inner chamber for setting therein of a vibrator, which produces vibrating effect to massage user's muscles, and for rec...
04/23/1991
5009223Variable axis knee brace
This invention comprises a knee brace for controlling knee instability and minimizing risk of injury to the knee in all types of sports. The mechanical hinge has the same kinematics as the human knee, allowing the knee brace to conform to the upper and lo...
04/23/1991
5009224Method for attaching a pressure-sensitive film article having high moisture vapor transmission rate
A method is disclosed for treating a wound or attaching a device or article to the skin using a film of pressure sensitive adhesive having dispersed therein a discontinuous gaseous phase contained within voids in the adhesive. The adhesive is formed from ...
04/23/1991
5009225Personal ventilating system
A personal exhaust system for individual use by the members of a surgical team in an operating room. It may be employed in conjunction with a disposable hood or combination hood and gown worn by each such person. Each system includes a d.c. powdered motor...
04/23/1991
5009226Mechanical resuscitator
A resuscitator for conveying gas to a patient's lungs. The resuscitator includes a pump having a cavity and including movable structure movable between a first position and a second position for forcing gas from the cavity of the pump when moved from the ...
04/23/1991
5009227Endotracheal tube holder
An endotracheal tube holder is provided which has the capability to hold both an endotracheal tube and a feeding tube in a side by side relationship. Two separate passageways are provided to hold each tube. A surrounding collet provides compression force ...
04/23/1991
5009228Device for relieving ear pain
A device for relieving inner ear pain comprised of a cup-shaped housing having a base, an interior adapted to fit over a user's outer ear, a hollow chamber in registry with the base of the cup-shaped member, and a heat dispersing medium disposed in the ho...
04/23/1991
5009229Steroid eluting intramuscular lead
An improved lead for electrically stimulating muscle tissue particularly configured for a cardiac assist system powered by surgically modified skeletal muscle tissue. The skeletal muscle is either wrapped about the heart itself, or about an auxiliary pump...
04/23/1991
5009230Personal glucose monitor
A device for the non-invasive determination of blood glucose of a patient. This glucose monitor is based upon the effect of glucose in rotating polarized infrared light. More specifically, two orthogonal and equal polorized states of infrared light of min...
04/23/1991
5009231Microprocessor controlled apparatus for the noninvasive determination of peripheral outflow and flow disturbances
A measuring apparatus for the noninvasive determination of peripheral outflow and flow disturbances in the extremities of human beings includes at least one light transmitter for directing light onto the skin of a human subject and at least one light rece...
04/23/1991
5009232Extracorporeal lithotripsy apparatus using high intensity shock waves for calculus disintegration and low intensity shock waves for imaging
An apparatus for extracorporeal lithotripsy includes a shock wave source which generates shock waves converging in focus a zone, within which a calculus to be disintegrated is disposed. The shock wave source can be selectively driven to generate high-inte...
04/23/1991
5009233Miniaturized hand-held laser scanning micrometer
A miniaturized laser scanning micrometer for making precision hand-held measurements comprises a compact housing for enclosing the micrometer and defining a main body handle portion which is gripped to hold the micrometer and a scanning gap extension proj...
04/23/1991
5009234For the thermodilution method of determining cardiac output
This invention relates to a catheter (1) and accompanying system for diagnosis of the cardio-vascular system of a patient. The catheter (1) flexible tube body (2), having at least one channel (3) therethrough leading from the extracorporal proximal end to...
04/23/1991
5009235Urine specimen collecting method using a vehicle
A vehicle (10) especially configured for collecting without observation urine specimens to be tested for the presence of illegal drugs, which has multiple privacy rooms (12) each with a urine disposal device (14). Each privacy room prevents access to liqu...
04/23/1991
5009236Urine collection system
A urine collection system that includes, in one embodiment, a mount with handle for manual positioning by a female, which mount includes fixed co-planer outwardly extending rods that are for receiving sleeves formed along edges of a mouth of a flexible ba...
04/23/1991
5009237Device for making cigarettes
A device for the do-it-yourself making of cigarettes employs a pre-proportioned tobacco rod (16) which is transferred from a cylindrical rod wrapping (18) into a cigarette paper tube (14) by an axially moveable pusher member (10; 110), which is associated...
04/23/1991
5009238Apparatus for supplying fibrous material to machines for simultaneously producing a plurality of cigarette rods
Apparatus for supplying comminuted tobacco leaves to the only distributor of a machine for simultaneously producing two cigarette rods employs several gates which can admit batches of tobacco into the magazine of the distributor either simultaneously or o...
04/23/1991
5009239Selective delivery and retention of aldehyde and nicotine by-product from cigarette smoke
A process for improving selective filter retention and pass through properties of cigarette filter elements by treating with polyethyleneimine modified to a predetermined pH range with one or more indicated water soluble organic acids, as a filter modifie...
04/23/1991
5009240Wafer cleaning method
A wafer cleaning system which cleans semiconductor wafers by sand blasting them with ice particles is disclosed. In this system a stream of gas is conducted by a conduit to the semiconductor wafer while a spray of water is frozen into the ice particles by...
04/23/1991
5009241Apparatus for washing narrow neck bottles
A narrow neck bottle is washed and rinsed by a method comprising the steps of supporting the bottle in an upside down position, injecting water containing air bubbles, into the bottle through a tube extending through the narrow neck of the bottle, accumul...
04/23/1991
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