Patent Leaderboard

USPTO Patent Rankings Data through Dec 31, 2025

Search Companies Inventors Cities States

Home › Ice slot maintenance

Ice slot maintenance

US Patent 4523876 · Granted Jun 18, 1985

Assignee

Shell Oil Compny

Inventors

Dean P. Hemphill (6 patents)

View full patent text on Google Patents →

More Patents by These Inventors

Pipeline launching module1986

Underwater trencher with pipelaying guide1986

Ice slot construction1985

Method and apparatus for on surface joining of submarine pipeline segments using1985

Method for sensing and remotely controlling a tool to workpiece spatial relation1984

Data from USPTO via PatentsView — © 2026 Patent Leaderboard

Last updated: Dec 31, 2025 · Updated quarterly