cave men used to use rocks as pillows and slept on flat surfices. so the stone age
No exact date, however, it was first used in China when they invented gun powder.
The first laptop/portable computer was invented in 1981 by Adam Osborne.
Impossible to say. Such inventions pre-date written history
the cabinet bed (a bed that folds up into the wall)
LaMarcus Adna Thompson patented the first roller coaster on January 20, 1885.
The first Black woman to receive a patent from the U.S. Patent and Trademark Office was Sarah E. Goode. In 1885, she patented her invention of a folding cabinet bed, which is a precursor to the modern rollaway bed. Goode's invention was designed to save space, catering to the needs of people living in small apartments. Her achievement was significant not only for her innovation but also for breaking racial and gender barriers in the field of invention.
last date of bed form
1817
The patent expiration date for a specific invention is typically calculated 20 years from the filing date of the patent application.
Pucks weren't discovered, they were invented. Some sources date the invention as early as 1872.
The date the inventor received exclusive right to his invention..
December of 1981