Wireless — Metals
InventTable — WIRELESS ERA — Materials, metals
| Invention | Description | Year | Inventor | Country |
| Snap on socket wrench | directional wrenches with improved leverage | 1920 | Joseph Johnson, William Seidemann | USA |
| Allen wrench | hex head screw | 1920 | Edigio Brugola, William G. Allen | Italy/USA |
| Super alloy Al-Ni-Cr | aluminum, nickel, chromium alloy | 1926 | Paul Dyer Merica | USA |
| Metal foam | extremely lightweight metal, porous | 1926 | John C. Elliott | USA |
| Metal detector | 1928 | Gerhard Fisher | Germany/USA | |
| Pop rivet, blind rivet | allows one sided application | 1928 | Louis Huck | USA |
| Shape memory alloys | gold-cadmium | 1928 | Arne Olander | Sweden |
| Beverage can | 1933 | American Can Co. | USA | |
| Phillips head screw | more reliable for mechanical application | 1934 | Henry F. Phillips | USA |
| Transistor | MOS transistor most common device made ever | 1947 | John Bardeen Walter Brattain, Willam Shockley, Bell labs | USA |
| Plasma spray | 1950 | Max Ulrich Schoop | Switzerland | |
| Electron beam welding | 1952 | Karl-Heinz, Steigerwald | Germany | |
| Hot isostatic pressing metal | HIP metal | 1955 | Gripshover, Hanes, Battelle's Columbus labs | USA |
| Integrated circuit | silicon metalloid semiconductor "chip" | 1958 | Jack Kilby | USA (21) |
| Pop top drink can | ring pull pop top | 1959 | Ermal Fraze | USA |