In what year did Linus Yale Sr. secure his foundational patent?
Answer
1861
Linus Yale Sr.'s major contribution to security technology was receiving the patent for his pin tumbler design in 1861.

Related Questions
Who secured the first patent for the Yale version of the pin tumbler lock?Which Yale inventor is primarily credited with inventing the modern, commercially viable pin tumbler lock?In what year did Linus Yale Sr. secure his foundational patent?What was the name of the business leader who partnered with Linus Yale Jr. to form the commercial entity?What lesson about invention is highlighted by the timeline of the Yale lock's success?Which Yale inventor earned induction into the National Inventors Hall of Fame?What are the two sets of pins housed in the cylinder of the pin tumbler lock mechanism?What key structural alignment must occur in the cylinder for the bolt to operate?What was the name of the commercial entity established to manufacture and distribute the Yale locks?How was the improved Yale lock viewed in terms of cost versus security in the late 19th century?What specific area did Linus Yale Jr. focus on to make the design more resistant to picking?