Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Method and apparatus for measuring any of a large number of characteristics of lamplight

Method and apparatus for measuring any of a large number of characteristics of lamplight

US Patent 4653925 · Granted Mar 31, 1987

Assignee

No assignee recorded.

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Toner cartridge2010
Half-sawtooth microstrip directional coupler2002
Optical filter1992
Filter with three-band transmission for good seeing1989
Colored object which exhibits improved constancy of color appearance upon change1989
Color-corrected hid mercury-vapor lamp having good color rendering and a desirab1984
High-intensity-discharge lamp of the mercury-metal halide type which efficiently1982
High-intensity-discharge lamp with improved color rendition of illuminated objec1982
Method and apparatus for expressing relative brightness of artificial illuminati1982
High-pressure mercury-vapor lamp which has both improved color rendition and lig1982