The stethoscope (Dr Renee Laennec, 1816)

Braille (Louis Braille (1824)

Pasteurisation (Louis Pasteur 1864)

Aqua lung or SCUBA (Jacques Cousteau 1943)

The metric system (1700s)

Canned food (Nicolas Appert 1809)

Ramjet engines (Rene Lorin 1913)

There are more…