Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 7919737 | High-speed cooking oven with optimized cooking efficiency The present invention is directed to improving the conventional high-speed cooking oven based on a combination of hot air impingement and microwave heating by providing a time-dependent spatial variation in the net air impingement and/or net microwave energy applied... | 04/05/2011 |
| 7329841 | Method for operating an oven, and an associated device Method and control device for operating an oven. The control device comprises an operating panel which is substantially flat and sealed. One or more touch-sensitive regions of the panel define electronic on/off switches and an electronic rotary switch. Processing me... | 02/12/2008 |
| 7304869 | Inverter power source control for high frequency heater At least one of a start abnormality detector (31), a temperature abnormality detector (32) and a voltage abnormality detector (33) has a latch inhibiting circuit for inhibiting retention of a detecting state when one of the abnormality detectors... | 12/04/2007 |
| 7282682 | High-frequency heating apparatus A purpose of the present invention is to provide an inverter circuit capable of firmly turning ON IGBTs under limited condition, while a heat loss and noise can be hardly produced in semiconductor switching elements. In a resonant type high frequency heating ... | 10/16/2007 |
| 7245087 | Power conversion device A power conversion device has a series circuit of a main switching element and a sub-switching element connected to both ends of a DC power supply, an insulating transformer, and control circuits. The main switching and sub-switching elements are alternately turned ... | 07/17/2007 |
| 7230219 | Inverter power source control for high frequency heater An oscillation control signal generated by an inverter power source control circuit (12) includes a reference voltage setting signal for approximating the current waveform of the AC output form the AC power source (1) to a sinusoidal wave by making bot... | 06/12/2007 |
| 7196640 | Relaxation oscillator based keypad decoder The keypad interface element of this invention uses a relaxation oscillator and a digital keypad processor having a counter/timer to decode specific keys. The RC portion of the relaxation oscillator includes a resistance ladder and a set of momentary on pushbutton s... | 03/27/2007 |
| 7141769 | Spectroscopy-based real-time control for microwave-assisted chemistry The invention is an instrument and method for microwave-assisted chemical synthesis. The instrument includes a source of microwave radiation for applying microwave energy to a sample, a microwave cavity in wave communication with the source for holding the sample du... | 11/28/2006 |
| 7064306 | Inverter microwave oven and method for controlling the same Disclosed herein are an inverter microwave oven and a method for controlling the same, wherein a switching frequency of an inverter is raised during the initial operation of the microwave oven and then lowered during the normal operation of the oven after the lapse ... | 06/20/2006 |
| 7061360 | Transformer/rectifier arrangement A rectifier transformer comprises two secondary windings, preferably with a single turn on each winding. The rectifier diodes form an integral part of each of the secondary windings. Thus, a compact arrangement is realised. In a high voltage application, the rectifi... | 06/13/2006 |
| 7038172 | Conveyorized food broiling apparatus A programmable control system for a cooking apparatus having a housing defining a cooking chamber with one or more food transport conveyors traveling there-through between opposing cooking elements. A food probe is provided for insertion into cooked food items to as... | 05/02/2006 |
| 7026590 | Low-output microwave, lighting system and flicker removing method using the same A low-output microwave lighting system includes: a rectifier for rectifying general AC power inputted through a power source unit and outputting a DC voltage; a power factor compensator for compensating a power factor of the DC voltage inputted through the rectifier... | 04/11/2006 |
| 7002123 | Microwave oven and method of controlling the same A microwave oven and a method of controlling the same. The microwave oven is capable of using a plurality of input powers with different frequencies. The microwave oven includes input power sources, an interrupt generation unit and a control unit. The interrupt gene... | 02/21/2006 |
| 6936803 | Inverter circuit of microwave oven An inverter circuit of a microwave oven employs a technique which decreases the unit manufacturing cost of production and controls an output of a magnetron correctly. The invert circuit includes a micom outputting a reference voltage preset by a user; an input curre... | 08/30/2005 |
| 6909076 | Microwave oven and control method thereof A microwave oven and control method thereof in which the microwave oven has a magnetron initially driven for a preset period of time to generating an output of at least 20% of a rated output of the magnetron when a cooking mode requiring a low output of less than 20... | 06/21/2005 |
| 6855918 | Microwave oven and method of controlling the same upon recognizing power supply frequency A microwave oven and a method of controlling the microwave oven recognize a power supply frequency correctly at a time power is supplied by eliminating the influence of noise. A blocking period is set in which generation of interrupts is deferred until a timer count... | 02/15/2005 |
| 6696676 | Voltage compensation in combination oven using radiant and microwave energy An oven includes both radiant cooking elements and a microwave cooking element that are controlled to reduce cooking time in relation to known radiant ovens. The oven is operable in a speed cooking mode utilizing radiant and microwave cooking elements, a ... | 02/24/2004 |
| 6680467 | Microwave delivery system with multiple magnetrons for a cooking appliance A microwave delivery system for a cooking appliance includes an electronic control unit and a plurality of magnetrons arranged in a spaced relationship for the introduction of various energy fields into an oven cavity. The electronic control unit creates ... | 01/20/2004 |
| 6486453 | Menu driven control system for a cooking appliance A cooking appliance includes a controller which calculates a desired percentage of hot air convection and microwave energy needed to perform a cooking operation based on selections made by a user through a menu driven display. The display prompts a user f... | 11/26/2002 |
| 6433321 | Microwave oven with high-power output switching means A microwave oven comprising a magnetron for generating a high frequency in response to a high voltage, a transformer having primary and secondary coils, the transformer generating the high voltage in a turn ratio of the primary and secondary coils and sup... | 08/13/2002 |
| 6414289 | Wall-mounted microwave oven and method for controlling the same A microwave oven includes a hood unit including a hood motor, a magnetron, a transformer having primary and secondary coils, the transformer generating a high voltage in a turn ratio of the primary and secondary coils and supplying the generated high volt... | 07/02/2002 |
| 6403937 | Combination convection/microwave oven controller A combination convection/microwave oven in which a food product is cooked by microwave energy from a source thereof and by a heated airflow provided by a thermal energy source and a blower. The food product is located in the near field of the microwave en... | 06/11/2002 |
| 6316757 | Halogen heater control apparatus of microwave oven and method thereof A halogen heater control apparatus of a microwave oven and a method thereof, comprises a plurality of halogen heaters which are connected to a utility AC power source, and a halogen heater switching unit. The halogen heater and incrementally alters infrar... | 11/13/2001 |
| 6211504 | Wall-mounted microwave oven and method for controlling hood motor therefor A wall-mounted microwave oven and a control method for controlling a hood motor are provided. Here, the wall-mounted microwave oven having a main body forming a cavity for accommodating foods to cook, a casing enclosing the main body and forming a hood du... | 04/03/2001 |
| 6172346 | Method of processing ceramic materials and a microwave furnace therefore A microwave furnace (10) of the type comprising a microwave source (14), coupled to an enclosure for the confinement of microwaves and for containing an object to be heated (12). An independently controllable alternate heating (20) is disposed in relation... | 01/09/2001 |
| 6084226 | Use of continuously variable power in microwave assisted chemistry A method of microwave assisted chemistry is disclosed in which power can be supplied more continuously at preferred power levels to more precisely control or moderate a chemical reaction. The method comprises measuring the duty cycle required to maintain ... | 07/04/2000 |
| 6072169 | Wall mounted microwave oven and control method therefor A wall mounted microwave oven is provided which includes a body forming therein a cavity for accommodating food to be cooked, a magnetron for generating electromagnetic waves to be provided into the cavity, a casing surrounding the body and forming therei... | 06/06/2000 |
| 6066838 | Microwave oven A microwave oven including a defrosting step in which a target which must be heated is irradiated with microwaves which are irregular in terms of time at least when the phase of water in the target is shifted from a solid body to liquid. The microwave ove... | 05/23/2000 |
| 6064048 | Magnetron driving control apparatus of microwave oven and method thereof A magnetron driving control apparatus of a microwave oven and a method thereof by which a magnetron is continuously driven when an output level selectively input by a user belongs to a continuous driving output range, and when the output level exceeds an ... | 05/16/2000 |
| 6025582 | Output control for a microwave oven, a hood device and associated lamp A wall type microwave oven having a hood device and an output control method thereof are disclosed. The microwave oven includes a first switch section for switching a power supply to a hood motor of the hood device, and a second switch section for switchi... | 02/15/2000 |
| 6013907 | Microwave oven equipped with thermopile sensor and thawing method using the same An improved microwave oven equipped with a thermopile sensor and a thawing method using the same which make it possible to detect a food surface temperature by using a thermopile sensor, optimizing the output from the magnetron based on the detected food ... | 01/11/2000 |
| 5986245 | Wall mounted microwave oven and control method therefor Disclosed is a wall mounted microwave oven and a control method therefor including a body forming a cooking cavity for accommodating food to be cooked, a magnetron for generating electromagnetic waves to be provided into the cooking cavity, a casing surro... | 11/16/1999 |
| 5973304 | Microwave oven having a silent cooking mode and method for operating the microwave oven A microwave oven having a silent cooking mode and a method for operating the microwave oven are disclosed. The microwave oven has a magnetron driving section connected to a secondary winding of a high voltage transformer which receives an external power s... | 10/26/1999 |
| 5567338 | Method for controlling the microwave feed in a microwave oven, and microwave oven with such control A method for controlling the microwave feed in a microwave oven, as well as a microwave oven for implementing the method, is disclosed. The power level (P) of the microwaves is controlled by periodic activation or inactivation of the microwave radiation s... | 10/22/1996 |
| 5552112 | Method and system for sterilizing medical instruments A method of sterilizing an object having the steps of providing a container with an exterior surface that has a microwave interactive layer and defines an interior space having an initial temperature. An object is then placed within the interior space of ... | 09/03/1996 |
| 5521359 | System for coordinating operation of microwave oven with a second appliance An electrical control scheme which permits operating power for a microwave oven and a second electrical appliance, such as a refrigerator, to be withdrawn from a single electrical outlet utilizes electrical contacts across which a voltage differential is ... | 05/28/1996 |
| 5488214 | Inductive cooking point heating system An inductive hot point heating system is regulated or controlled by an oscillation packet control, which uses a symmetrical pattern of complete mains half-waves. The switching takes place in the zero passage and is symmetrical in such a way that there is ... | 01/30/1996 |
| 5468940 | Microwave oven for simultaneously cooking two dishes of food A microwave oven is provided with a removable shelf for dividing a cavity into upper and lower heating zones. Microwave energy from a magnetron is selectively introduced into the upper and lower heating zones to controllably cook separate food items place... | 11/21/1995 |
| 5459301 | Cyclic microwave treatment of pressed garments Pressed garments are treated with microwaves to activate chemicals without heating the garments, resulting in permanent creases without fabric damage. An apparatus controls the process or curing cross-linking agent impregnated cellulosic fabric with micro... | 10/17/1995 |
| 5317133 | Method for controlling the microwave energy in a microwave oven, and microwave oven for implementing the method A microwave oven having a pulsed magnetron comprises a timing circuit which determines a cooking time and the pulse duration when the magnetron is pulsed. By means of a time and power setting device, the cooking time and the pulse duration are adapted to ... | 05/31/1994 |
