U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Did You Know...

...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.

Newsletter  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.

 

Class 338/52 - Granular, powdered, or transversely stacked resistance element


Subclass of Class 338 - Electrical resistors
Definition: Subject matter wherein the resistance element is granular
No. of patents: 6
Last issue date: 10/02/2007


NumberTitleIssue Date
7277289Resistor for controlling a fan motor rotating speed for use in an air conditioner
Provided is a resistor for controlling a fan motor rotating speed for use in an air conditioner. The resistor comprises a base body, a radiator attached to a top portion of the base body, a printed resistor circuit board covered with insulating sheets and received w...
10/02/2007
6924726Liquid-cooled high-power resistor
A high-power resistor comprises a plurality of resistor elements (1), made of sheets of an electrically conductive resistance material, with a first (13) and a second (14) terminal. The resistor elements are mutually separated by disc-shaped ins...
08/02/2005
6069553Blower speed control resistors for automotive or other service
A layered electrical resistor having flat components stacked as follows: a first metal outer plate, a first thin outer electrical insulator, a first thin sheet metal resistor element, a first thin inner insulator, a metal midplate, a second thin inner ins...
05/30/2000
5945905High power resistor
A high power resistor includes a substrate of an insulating material having opposed first and second surfaces, and a strip of a resistance material on the first surface of the substrate. The resistance strip has side edges which are spaced from the side e...
08/31/1999
5120935Method and apparatus for oil well stimulation utilizing electrically heated solvents
A method and apparatus of stimulating production from an oil well by removing solid wax deposits from a production zone, includes an electrical resistance heater comprised of a packed bed of spherical heating elements lowered through the tubing on a wirel...
06/09/1992
4227410Attitude compensating indicator
An indicator for measuring the liquid content of a container comprises an attitude compensating sensor including at least two variable resistor assemblies disposed within the container. The resistor assemblies are located at opposite ends of the container...
10/14/1980
 
Sign InRegister
Username  
Password   
forgot password?