Astronomical Instruments[edit]
Instrument makers[edit]
Timekeeping[edit]
- Pendulum clock
- Marine chronometer
- Time signal
- Charles Frodsham
- E. Howard & Co.
- Sigmund Riefler and Riefler escapement
- William Bond & Son [1]
Radio and telegraph[edit]
- Lee De Forest and Audion
- Hammarlund
- National Radio Company
- American Radio and Research Corporation (AMRAD)
Scientists[edit]
Chip-scale atomic clock[edit]
- 2004 [2]
- 2004 [3]
- 2006 [4]
- 2011 [5] first commercial CSAC
- 2011 [6]
- 2014 [7] new design 'Comb on a Chip'
[8] bibliography