Patent Leaderboard

USPTO Patent Rankings Data through Dec 31, 2025

Search Companies Inventors Cities States

Home › Dual-chambered hydro tub Spa

Dual-chambered hydro tub Spa

US Patent D309186 · Granted Jul 10, 1990

Assignee

Unknown

Inventors

John Hargrove (4 patents)

View full patent text on Google Patents →

More Patents by These Inventors

Simultaneous gated integrated detection device and process2022

Contrast-healing water spa system1988

Self-adjusting, distributed control, access method for a multiplexed single-sign1984

Data from USPTO via PatentsView — © 2026 Patent Leaderboard

Last updated: Dec 31, 2025 · Updated quarterly