Question:
Who invented the Safety Pin?
Answer:
Walter Hunt
Question:
Which is the invention year of Ice Resurfacer?
Answer:
1949
Question:
Who is the real inventor of fan?
Answer:
Philip Diehl
Question:
Who invented the wheel lock trigger?
Answer:
Johann Kiefuss
Question:
Which is the invention year of Printer?
Answer:
1440
