Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Rhombic-shaped scale device for use in judging discoloration, fading or staining

Rhombic-shaped scale device for use in judging discoloration, fading or staining

US Patent 4715716 · Granted Dec 29, 1987

Assignee

No assignee recorded.

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Illumination variable colorimetric method and colorimeter2003
Weathering test apparatus having a long-arc type air-cooled vertical metal halid2003
Oxygen-hydrogen electrolytic gas generation apparatus1997
Apparatus for removing snow deposited on wall of snow generating apparatus1989
Apparatus for measuring the moisture content of snow particles1989
Artificial snow production apparatus1989
Artificial snow wetting apparatus1988
Color indication comparison method1988
Apparatus for changing artificial snow to wet snow1988
Apparatus for changing artificial snow to wet snow1988
Falling particle televising apparatus1988
Snow generating and snowfall apparatus1988