James Sargent
the egyptians
g Washington
Robert Hooke invented the spring balance.
About 4,000 years ago wooden locks and keys were invented.
Kelly Jones
The childproof conatiners were invented by Dr. Henri Brealt (1909-1983)
Yes, locks and keys were invented in ancient times, and they were still produced and used in the middle ages.
The back hand spring was usually invented in the 1960's if u ask me
the spring as first used in the late 1400's.
Locks were first invented around 4000 years ago in ancient Egypt. The earliest known locks were made of wood and consisted of a wooden bolt that slid into a slot to secure a door or gate. Over time, locks have evolved and become more sophisticated, with various types and mechanisms developed to enhance security.
to help for closing locks for homes and cars in the olden days