Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Passive smoke plume opacity monitor

Passive smoke plume opacity monitor

US Patent 4320975 · Granted Mar 23, 1982

Estimated economic value: $2,404,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Particulate detection and calibration of sensors2013
Apparatus for high-accuracy fiber counting in air2010
Methods and apparatus for mechanical resonance monitoring a mass concentration o2007
Methods and apparatus for monitoring a mass concentration of particulate matter2006
System for, and method of, monitoring airborne particulate, including particulat2000
System and method for resonant filter mass monitoring1994
System and method for determining and outputting airborne particle concentration1994
Method and apparatus for real time asbestos aerosol monitoring1990
Automatic detector for microscopic dust on large-area, optically unpolished surf1983