151. Who is the inventor of underwater welding?
152. Who designed the world's first electric tram?
John Joseph Wright
153. Who is one of the inventors of instant noodles?
Henry Parsons Crowell
James Caleb Jackson
154. In which year, Earl Silas Tupper developed Tupperware?
155. Chipper chain was invented by:
156. Who invented the pull-chain light socket?
George P. Knapp
157. Which company developed T9, the predictive text?
158. Who invented carbon microphone?
Alexander Graham Bell
David Edward Hughes
159. In which year, Robert Gair invented the folding carton?
160. Who was the first to successfully drill for oil?
Francis B. Brewer