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Class Information
Number: 338/99
Name: Electrical resistors > Mechanically variable (e.g., rheostat) > Surfaces pressed together (e.g., compressible type)
Description: Subject matter wherein (1) two or more separate and distinct masses, including grains, of resistance material or (2) a distinct and separate mass of resistance material and a mass of conductive material are in exterior surface engagement with one another, together with means for varying the surface engagement pressure to vary the contact resistance between the engaging surfaces.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7554045 |
Linear pressure sensor |
Jun. 30, 2009 |
| 7528337 |
Pressure sensitive conductive sheet and panel switch using same |
May. 5, 2009 |
| 7391296 |
Resilient material potentiometer |
Jun. 24, 2008 |
| 7213323 |
Method of forming an electronic pressure sensitive transducer on a printed circuit board |
May. 8, 2007 |
| 7190251 |
Variable resistance devices and methods |
Mar. 13, 2007 |
| 7187264 |
Foil-type switching element with improved spacer design |
Mar. 6, 2007 |
| 7161460 |
Switching element provided with a foil construction |
Jan. 9, 2007 |
| 7154370 |
High precision power resistors |
Dec. 26, 2006 |
| 7145432 |
Flexible switching devices |
Dec. 5, 2006 |
| 7080562 |
High-sensitivity pressure conduction sensor for localized pressures and stresses |
Jul. 25, 2006 |
| 7068142 |
Pressure-sensitive resistor and pressure-sensitive sensor using the same |
Jun. 27, 2006 |
| 6987232 |
Sensor and method for detecting a patient's movement via position and occlusion |
Jan. 17, 2006 |
| 6967561 |
Current control device |
Nov. 22, 2005 |
| 6943660 |
Current control device |
Sep. 13, 2005 |
| 6909354 |
Electronic pressure sensitive transducer apparatus and method for manufacturing same |
Jun. 21, 2005 |
| 6867681 |
Circuit protection device |
Mar. 15, 2005 |
| 6842885 |
Computer program product for defining slits in a bus on a chip |
Jan. 11, 2005 |
| 6841743 |
Multidirectional control switch and multidirectional input device using the same |
Jan. 11, 2005 |
| 6798332 |
Current control device |
Sep. 28, 2004 |
| 6798331 |
Current control device |
Sep. 28, 2004 |
| 6794983 |
Current control device |
Sep. 21, 2004 |
| 6794982 |
Multidirectional input device and electronic apparatus comprising it |
Sep. 21, 2004 |
| 6791037 |
Multi-direction switch |
Sep. 14, 2004 |
| 6737953 |
Passenger detector |
May. 18, 2004 |
| 6661332 |
Press-type varistor switch |
Dec. 9, 2003 |
| 6646540 |
Conductive structures |
Nov. 11, 2003 |
| 6568068 |
Fabrication of PTC heating devices |
May. 27, 2003 |
| 6563435 |
Glass keyboard and method for producing a glass keyboard |
May. 13, 2003 |
| 6563415 |
Analog sensor(s) with snap-through tactile feedback |
May. 13, 2003 |
| 6531951 |
Force sensor |
Mar. 11, 2003 |
| 6529122 |
Tactile sensor apparatus and methods |
Mar. 4, 2003 |
| 6452479 |
Detector contructed from fabric |
Sep. 17, 2002 |
| 6437682 |
Pressure sensitive direction switches |
Aug. 20, 2002 |
| 6404323 |
Variable resistance devices and methods |
Jun. 11, 2002 |
| 6388556 |
Film pressure sensitive resistor and pressure sensitive sensor |
May. 14, 2002 |
| 6373373 |
Electronic pressure-sensitive device for detecting the magnitude of load as electrical resistance |
Apr. 16, 2002 |
| 6351205 |
Variable-conductance sensor |
Feb. 26, 2002 |
| 6344791 |
Variable sensor with tactile feedback |
Feb. 5, 2002 |
| 6323751 |
Current limiter device with an electrically conductive composite material and method of manufacturing |
Nov. 27, 2001 |
| 6285276 |
Control device for an industrial truck |
Sep. 4, 2001 |
| 6275138 |
Variable resistor changing resistance value by pressing |
Aug. 14, 2001 |
| 6201468 |
Deflection sensor |
Mar. 13, 2001 |
| 6188331 |
Tactile sensor and method for determining a shear force and slip with such a tactile sensor |
Feb. 13, 2001 |
| 6133820 |
Current limiting device having a web structure |
Oct. 17, 2000 |
| 6121870 |
Pressure sensitive transducer with pressure sensitive layer including semi-conductive particles |
Sep. 19, 2000 |
| 6121869 |
Pressure activated switching device |
Sep. 19, 2000 |
| 6114645 |
Pressure activated switching device |
Sep. 5, 2000 |
| 6107612 |
Heating device and method |
Aug. 22, 2000 |
| 6069552 |
Directionally sensitive switch |
May. 30, 2000 |
| 6011273 |
Thin-film semiconductor device having pressure sensitive and non-sensitive regions |
Jan. 4, 2000 |
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