Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Positive displacement rotary pump with bearings in countersunk portions of the rotors

Positive displacement rotary pump with bearings in countersunk portions of the rotors

US Patent 4293290 · Granted Oct 6, 1981

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Weep hole plug for a fluid circulating pump1996
Non-drip fluid circulating pump1994
Torsional vibration damper1991