User:Mu301/SciTech

Astronomical Instruments

• Astronomical spectroscopy
• Meridian circle
• Schmidt camera
• Transit instrument

Instrument makers

• John Brashear
• Charles S. Hastings
• George N. Saegmuller

Timekeeping

• Pendulum clock
• Marine chronometer
• Time signal
• Charles Frodsham
• E. Howard & Co.
• Sigmund Riefler and Riefler escapement
• William Bond & Son [1]

Radio and telegraph

• Lee De Forest and Audion
• Hammarlund
• National Radio Company
• American Radio and Research Corporation (AMRAD)

• WGI (defunct)

Scientists

• Robert Horace Baker
• Frederick Slocum
• Charles Hugh Smiley
• Winslow Upton
• Frank Washington Very

Chip-scale atomic clock

Chip-scale atomic clock

• 2004 [2]
• 2004 [3]
• 2006 [4]
• 2011 [5] first commercial CSAC
• 2011 [6]
• 2014 [7] new design 'Comb on a Chip'

[8] bibliography