Question

1. select all that apply. select two facts about granville woods. his innovations in artillery cannons helped the north win the civil war. he invented the telegraphony that allowed users to switch between voice and telegraph messages. he improved engine efficiency while working on a river steamboat. his inventions improved transportation that included the trolley conducting system, the third rail, and improved air brakes in trolley cars. 4) select all that apply. select two facts about lewis howard latimer. he was the first black engineer to graduate from a u.s. college. his first patent was for an air - conditioning unit. the draftsman learned about patents working in a patent law office. he partnered with edison to invent a durable filament improving the light bulb. he assisted alexander graham bell in drafting drawings and processing his patent for the telephone.

Explanation:

Granville Woods made contributions to telegraphy and transportation - related inventions. Lewis Howard Latimer worked in a patent - law office and partnered with Edison on light - bulb filament improvement and assisted Bell with telephone patents.

Answer:

1. He invented the telegraphy that allowed users to switch between voice and telegraph messages.

His inventions improved transportation that included the trolley conducting system, the third rail, and improved air brakes in trolley cars.

1. The draftsman learned about patents working in a patent law office.

He partnered with Edison to invent a durable filament improving the light bulb.