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Class Information
Number: 257/E29.172
Name: Active solid-state devices (e.g., transistors, solid-state diodes) > Semiconductors devices adapted for rectifying, amplifying, oscillating, or switching, capacitors, or resistors with at least one potential-jump barrier or surface barrier (epo) > Types of semiconductor device (epo) > Controllable by only signal applied to control electrode (e.g., base of bipolar transistor, gate of field-effect transistor) (epo) > Bipolar device (epo) > Double-base diode (epo)
Description: This subclass is indented under subclass E29.171. This subclass is substantially the same in scope as ECLA classification H01L29/70B.










Patents under this class:

Patent Number Title Of Patent Date Issued
7671379 Semiconductor system for voltage limitation Mar. 2, 2010
7211851 Ferroelectric memory May. 1, 2007
6037632 Semiconductor device Mar. 14, 2000
4292644 Control of valley current in a unijunction transistor by electron irradiation Sep. 29, 1981
4182965 Semiconductor device having two intersecting sub-diodes and transistor-like properties Jan. 8, 1980











 
 
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