Uncategorized
Inventor
Adjustable shoe-skate assembly
Knob assembly for typewriter platen or the like
Modified harmonic drive actuator
Skate sharpening devices
LandOfFree
Donald R. Humphreys 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 R. Humphreys, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Donald R. Humphreys will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-P-1613