eGVybw%3D%3D - zipp
- helicopter
- Henry Bessemer
- Herman Hollerith
- Hilaire Chardonnet
- holography
- homeopathy
- hot-air balloon
- Howard Aiken
- Humphry Davy
- I W McGaffey
- Igor Sikorsky
- Ira Rubel
- Irving Langmuir
- Isaac Newton
- Isaac Singer
- J A O’Neill
- J S Duncan
- Jack Kilby and Robert Noyce (according to US Patent Office)
- Jack Kilby and Robert Noyce (according to US Patent Office)
- Jacob Schick
- Jacques and Joseph Montgolfier
- Jacques E Brandenberger
- James A Bonsack
- James Dewar
- James Hargreaves
- James L Fergason
- James Ritty
- James Watt
- Jean Bernard Leon Foucault
- jet aircraft engine
- Johann Gutenberg
- John A Roebling
- John B Dunlop
- John Bardeen, Walter Brattain, William Shockley
- John Deere
- John Ericsson
- John Fleming
- John Hadley, Thomas Godfrey
- John Harrison
- John L Baird
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