Horology: time measuring systems or devices
Time interval
With alternately operating indicators
Assignee
active
No affiliations
LandOfFree
Donald M. Richardson does not yet have a rating. At this time, there are no reviews or comments for this inventor.
If you have personal experience with Donald M. Richardson, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Donald M. Richardson will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-P-997342