Patent Leaderboard

USPTO Patent Rankings Data through Dec 31, 2025

Search Companies Inventors Cities States

Home › Cutting tool

Cutting tool

US Patent 4956916 · Granted Sep 18, 1990

Assignee

No assignee recorded.

Inventors

Duane D. Robertson (8 patents)

View full patent text on Google Patents →

More Patents by These Inventors

Combined clamping and cutting tool for plastic pipes2004

Spring-biased cutting tool for plastic pipes2002

Replacement fitting for rigid, plastic pipes2001

Pipe fitting1996

Pipe saddle1988

Cutting tool for flexible plastic conduit1982

Cutting tool for flexible plastic conduit1982

Data from USPTO via PatentsView — © 2026 Patent Leaderboard

Last updated: Dec 31, 2025 · Updated quarterly