Assertion: contact transistor | /r/HasProperty | bell labs
Facets:
Source sentences:
text: Bipolar junction transistors were the first type of transistor to be mass-produced in 1947 in the form of the point contact transistor (Bell Labs).
text: Bipolar junction transistors were the first type of transistor to be mass-produced in 1947 in the form of the point contact transistor (Bell Labs).