Geometrical instruments
Straight-line light ray type
Alignment device
Inventor
active
No associations
LandOfFree
Roy Butler, Sr. does not yet have a rating. At this time, there are no reviews or comments for this inventor.
If you have personal experience with Roy Butler, Sr., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Roy Butler, Sr. will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-P-2476071