4. Education and demonstration
  5. Communication aids for the handicapped

Ruth B. Leff

Inventor

Rate now
  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Inventor

active

Cabinet for instructional electronic communication

Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Communication aid

Education and demonstration – Communication aids for the handicapped
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Communication aid

Printed matter – Calendar
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Communication aid

Communications: electrical – Systems – Call station
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Communication aid using multiple membrane switches

Education and demonstration – Question or problem eliciting response
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Ruth B. Leff does not yet have a rating. At this time, there are no reviews or comments for this inventor.

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

Rate now

     

Profile ID: LFUS-PAI-P-666108

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.

Canada

 Charities
 Companies
 MP Candidates
 Patents
 Employee Salary Disclosure

World

 Places of the World
 Scientific Papers

United States

 Banks
 Companies
 Counties
 Patents
 Employee Salary Disclosure