Optics: measuring and testing
Fiducial instruments
Reticle lies outside viewing path
Inventor
active
Optical sight with variable illumination
Spectral color generator
No associations
LandOfFree
William E. Calder does not yet have a rating. At this time, there are no reviews or comments for this inventor.
If you have personal experience with William E. Calder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and William E. Calder will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-P-1099639