Assertion: transistor | /r/HasProperty | invented
Facets:
value: during the early 1950s
type: TEMPORAL
Source sentences:
text: Transistors have revolutionised the electronic industries since they were first invented.
text: Before transistors were invented, relays were used in early computers.
text: The transistor was invented during the early 1950s, and it quickly replaced vacuum tubes in electronic devices.
text: Calculators, televisions and megaphones became smaller and more affordable; some of these were not even possible until the transistor was invented.