Geometrical instruments
Straightedge type
Base attached
Inventor
active
Navigational calculating device
Navigational calculating device
No associations
LandOfFree
David M. McEwen does not yet have a rating. At this time, there are no reviews or comments for this inventor.
If you have personal experience with David M. McEwen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and David M. McEwen will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-P-1401691