Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Air preheater

Air preheater

US Patent 4474229 · Granted Oct 2, 1984

Estimated economic value: $949,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Machine reading of printed data2015
Monitoring moving articles2015
Rearview mirror assembly with running lights2010
Screw fastener cap1990