4. Measuring, testing, or signalling instruments
  5. Measuring, regulating or indicating instrument, or casing
  6. Volume, flow or rate

David William Spencer

Inventor

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

Details

Inventor

active

Inhalation testing method and means

Surgery – Diagnostic testing – Respiratory
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Inspiratory flow meter

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Volume – flow or rate
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Ventilatory capacity meters

Surgery – Diagnostic testing – Respiratory
Reexamination Certificate

  [ 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

David William Spencer does not yet have a rating. At this time, there are no reviews or comments for this inventor.

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

Rate now

     

Profile ID: LFUS-PAI-P-1120350

  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