Inventions

What did A. Bell invent?

In what country was Bell born?

Who financed his invention?

How many people were connected by the telephone for the first time?

What doe the word "accurate" mean?

What clocks did a minute hand have?

What clocks were the oldest to tell time?

Where were the first shadow clocks used?

What clock is used to boil eggs?

Where were the first writwatches made?

When was the first communication satellite launched?