Seiko HAQ wristwatch with a cesium atomic oscillator (chip-scale atomic clock)

As I discussed in below quote, Seiko has patented a new HAQ method with dual oscillators (likely based on an older Citizen method for which the patent has expired).

CitizenPromaster said:

———— NEW SEIKO PATENT WARNING ————–

What is also jumping out at me this time, is that JPS57116287A recently got cited by none other than Seiko Epson.

View attachment 18861739

The Japanse characters don't give anything away to us…

Click to expand…

Seiko HAQ wristwatch with a cesium atomic oscillator (chip-scale atomic clock)