Search Result For patent
The day jeans were patented – level 1
20-05-1873Levi Strauss is from Germany. He comes to the United States...
The day jeans were patented – level 2
20-05-1873Levi Strauss was a German immigrant who came to the United...
The day jeans were patented – level 3
20-05-1873Levi Strauss was a German immigrant who came to the United...
The day the telephone was patented – level 1
07-03-1876Alexander Graham Bell starts his experiments in 1873. He wants to...
The day the telephone was patented – level 2
07-03-1876Alexander Graham Bell started his experiments in 1873. He was trying...
The day the telephone was patented – level 3
07-03-1876Since 1873, Alexander Graham Bell was trying to find a way...
The day the most famous formula was published – level 1
27-09-1905In 1905, Albert Einstein is a young man. He works for...
The day the most famous formula was published – level 2
27-09-1905In 1905, Albert Einstein was a young man. He worked for...
The day the most famous formula was published – level 3
27-09-1905In 1905, Albert Einstein was a young man working for the...
The day the inventor of Morse Code was born – level 3
27-04-1791Samuel Morse was born on April 27, 1791, in Massachusetts, which...
