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Class Information
Number: 361/281
Name: Electricity: electrical systems and devices > Electrostatic capacitors > Variable > Responsive to external condition > Electrical
Description: Subject matter in which the external condition is electrical, as for example, changes in the signal frequency.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7400489 |
System and a method of driving a parallel-plate variable micro-electromechanical capacitor |
Jul. 15, 2008 |
| 7346981 |
Method for fabricating microelectromechanical system (MEMS) devices |
Mar. 25, 2008 |
| 7277267 |
Multi-layer capacitive transducer |
Oct. 2, 2007 |
| 7274277 |
Ferroelectric devices and method relating thereto |
Sep. 25, 2007 |
| 7092232 |
Variable capacitance capacitor, circuit module, and communications apparatus |
Aug. 15, 2006 |
| 7032448 |
Capacitive humidity sensor |
Apr. 25, 2006 |
| 7031136 |
Variable capacitors, composite materials |
Apr. 18, 2006 |
| 7030463 |
Tuneable electromagnetic bandgap structures based on high resistivity silicon substrates |
Apr. 18, 2006 |
| 7031137 |
Variable micro-capacitor with a high ratio and a low operating voltage |
Apr. 18, 2006 |
| 7027284 |
Variable capacitance element |
Apr. 11, 2006 |
| 7006342 |
Variable capacitor having a rigidity-increasing feature |
Feb. 28, 2006 |
| 6975498 |
Variable capacitor |
Dec. 13, 2005 |
| 6952337 |
Variable capacitor |
Oct. 4, 2005 |
| 6944008 |
Charge dissipation in electrostatically driven devices |
Sep. 13, 2005 |
| 6937456 |
Direct digitally tunable microwave oscillators and filters |
Aug. 30, 2005 |
| 6920311 |
Adaptive radio transceiver with floating MOSFET capacitors |
Jul. 19, 2005 |
| 6909589 |
MEMS-based variable capacitor |
Jun. 21, 2005 |
| 6853476 |
Charge control circuit for a micro-electromechanical device |
Feb. 8, 2005 |
| 6833985 |
Variable capacitance element |
Dec. 21, 2004 |
| 6738601 |
Adaptive radio transceiver with floating MOSFET capacitors |
May. 18, 2004 |
| 6735073 |
Electronic devices based on density wave dielectrics |
May. 11, 2004 |
| 6701779 |
Perpendicular torsion micro-electromechanical switch |
Mar. 9, 2004 |
| 6690569 |
Capacitive sensor |
Feb. 10, 2004 |
| 6646525 |
Microelectro-mechanical system actuator device and reconfigurable circuits utilizing same |
Nov. 11, 2003 |
| 6625004 |
Electrostatic actuators with intrinsic stress gradient |
Sep. 23, 2003 |
| 6621392 |
Micro electromechanical switch having self-aligned spacers |
Sep. 16, 2003 |
| 6549394 |
Micromachined parallel-plate variable capacitor with plate suspension |
Apr. 15, 2003 |
| 6542350 |
Reservoir volume sensors |
Apr. 1, 2003 |
| 6507475 |
Capacitive device and method of manufacture |
Jan. 14, 2003 |
| 6441449 |
MEMS variable capacitor with stabilized electrostatic drive and method therefor |
Aug. 27, 2002 |
| 6442013 |
Apparatus having capacitive sensor |
Aug. 27, 2002 |
| 6433375 |
Tunable microwave devices |
Aug. 13, 2002 |
| 6404614 |
Voltage tuned dielectric varactors with bottom electrodes |
Jun. 11, 2002 |
| 6373682 |
Electrostatically controlled variable capacitor |
Apr. 16, 2002 |
| 6370008 |
Capacitor film for a self-healing film capacitor |
Apr. 9, 2002 |
| 6215644 |
High frequency tunable capacitors |
Apr. 10, 2001 |
| 6127908 |
Microelectro-mechanical system actuator device and reconfigurable circuits utilizing same |
Oct. 3, 2000 |
| 6100773 |
Impedance matching device |
Aug. 8, 2000 |
| 5959516 |
Tunable-trimmable micro electro mechanical system (MEMS) capacitor |
Sep. 28, 1999 |
| 5955659 |
Electrostatically-actuated structures for fluid property measurements and related methods |
Sep. 21, 1999 |
| 5925117 |
Method and apparatus for enabling application programs to continue operation when an application resource is no longer present after undocking from a network |
Jul. 20, 1999 |
| 5901031 |
Variable capacitor |
May. 4, 1999 |
| 5874832 |
Precise high resolution non-contact method to measure dielectric homogeneity |
Feb. 23, 1999 |
| 5771148 |
Intercalation-based voltage variable capacitor |
Jun. 23, 1998 |
| 5721194 |
Tuneable microwave devices including fringe effect capacitor incorporating ferroelectric films |
Feb. 24, 1998 |
| 5636099 |
Variable capacitor formed by multilayer circuit board |
Jun. 3, 1997 |
| 5600187 |
Electronically controllable capacitors using power MOSFET's |
Feb. 4, 1997 |
| 5589864 |
Integrated varactor switches for acoustic ink printing |
Dec. 31, 1996 |
| 5546006 |
Guarded capacitance probes for measuring particle concentration and flow |
Aug. 13, 1996 |
| 5459406 |
Guarded capacitance probes for measuring particle concentration and flow |
Oct. 17, 1995 |
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