Zhang Heng was the firts to invent the earthquake weathercock in 132 A.D.
the dream was frist invented when be
The ionization type smoke detector was invented in 1931 in Switzerland.
Germany
Seismograph
wen was the frist ford gt invented
The metal detector was invented in 1931 by Gerhard Fisher.
The metal detector was invented in 1931 by Gerhard Fisher.
he invented the frist laborty
timothy lunsford
IF you are alive, you have a heart
to see if people were lying
the metal detector was invented because people in old days use to use it so they could find stuff in there body I think