Who invented the BALLPOINT PEN?
Biro Brothers
Waterman Brothers
Bicc Brothers
Write Brothers
When was barb wire patented?
1873
1840
1895
1900
In which decade was the first solid state integrated circuit demonstrated?
1950s
1960s
1970s
1980s
Electric lamp was invented by:
Theory of evolution was presented by ?
What Galileo invented?
Barometer
Pendulum clock
Microscope
Thermometer
Roentgen invented:
Who invented Braille script?