| 1875 ROBERTS Distance And Altitude Measure Patent 6587 |
| 1957 MEJEAN Altitude Speed Switch Patent Print |
| 1950 BEVINS JAMES Altitude Switch Patent Print |
| 1954 HUCH Constant Altitude Balloon Patent Print |
| 1939 RUOPP Temperature Altitude Gauge Patent 48916 |
| 1965 DEANER Altitude Sensing Apparatus Patent |
| 1966 INT LATEX CORP High Altitude Helmet Patent |
| 1930 RICHARD High Altitude Flying Machine Patent |
| 1941 HEIDBRINK High Altitude Chamber Patent |
| 1945 STRONG JAMES Low Altitude Bomb Patent Print |
| 1942 FRANK High Altitude Aircraft Patent Print |
| 1966 SHEPARD High Altitude Helmet Patent Print |
| 1950 BENDIX AVIAT CORP Altitude Switch Patent |
| 1934 ZEUS Automatic Altitude Propeller Patent |
| 1957 AEROTEC CORP Altitude Speed Switch Patent |
| 1941 AIR REDUCTION High Altitude Chamber Patent |
| 1944 WAGNER Low Altitude Bomb Sight Patent Print |
| 1921 MOTT High Altitude Flying Machine Patent |
| 1945 MARSHALL Altitude Compensator Patent Print |
| 1943 JACOBSSON Altitude Controlled Valve Patent |
| 1963 FRIEDMAN High Altitude Transducers Patent |
| 1946 CARR Low Altitude Parachute Patent Print |
| 1961 TENNEY High Altitude Load Release Patent |
| 1952 BAKER Altitude Warning Signal System Patent |