Vacuum Cleaner History
74 بار بازدید -
7 سال پیش
-
In 1907, James Murray Spangler,
In 1907, James Murray Spangler, a janitor from Canton, Ohio, invented the first practical, portable vacuum cleaner. Unable to produce the design himself due to lack of funding, he sold the patent in 1908 to William Henry Hoover who had Spangler's machine redesigned with a steel casing, casters, and attachments.
7 سال پیش
در تاریخ 1396/04/31 منتشر شده
است.
74
بـار بازدید شده