doorknob articles
Who is credited with patenting the design that became the foundation for the modern doorknob?
In what year did Osbourn Dorsey secure the patent for his door-holding device?
What was Osbourn Dorsey's initial profession before conceiving his patented design?
How old was Osbourn Dorsey when he patented the design for the modern doorknob?
What material did Dorsey primarily use for manufacturing his robust, patented doorknobs and doorstops?
What rudimentary door-securing method preceded widespread adoption of the modern knob?
What innovation distinguishes Dorsey’s patented device from earlier cast-metal knobs introduced around 1846?
Which of the following items was NOT listed as one of Osbourn Dorsey's other industrial or household inventions?
What significant legal detail identifies Dorsey's patent for the door-holding device?