Charles D. Helfenberger

Details Charles D. Helfenberger Charles D. Helfenberger

Typewriting machines

Including interposed inking device for record-medium

Including mechanism for shifting ribbon laterally at...

Inventor

active

Affiliated with

Also associated with

No associations

Rating

Charles D. Helfenberger does not yet have a rating. At this time, there are no reviews or comments for this inventor.

If you have personal experience with Charles D. Helfenberger, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charles D. Helfenberger will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-P-1548240