[time-nuts] Odd request

[Brooke Clarke]

Hi Tom:

I've been looking at patents for secondary clocks and find that there's two 
class numbers:  368/59 is Horology/Secondary and 968/548 is Horology/stepping 
secondary.

Do you know what the difference is between the two top class numbers both 
called Horology?

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com