Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Optical digitizer for measuring spirometer output

Optical digitizer for measuring spirometer output

US Patent 4307729 · Granted Dec 29, 1981

Estimated economic value: $3,069,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Oxygen generator with storage and conservation modes2010
Method for operating gas generators in tandem2008
System and method for attaching tubing2004
Variable inlet air restriction for composition control of product gas2003
Apparatus for and method of combating the gravity push-pull effect experienced b2002
Method of controlling a modular ceramic oxygen generating system2002
Electrochemical oxygen generating system2002
Modular ceramic electrochemical apparatus and method of manufacture therefore2001
Modular ceramic electrochemical apparatus and method of manufacture therefor1999
Oxygen concentrator with beds' duty cycle control and self-test1999
Monitoring gaseous oxygen concentration1995
Oxygen partial pressure controller for a pressure swing adsorption system1986