Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Foldable ladder structure and method of manufacturing the same

Foldable ladder structure and method of manufacturing the same

US Patent 4834216 · Granted May 30, 1989

Estimated economic value: $11,598,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Fiber optic tap2006
Compact optical module with adjustable joint for decoupled alignment2005
Compact optical module with adjustable miter joint for decoupled alignment2003
Step signal2003
Vacuum plate disc stabilizer for a spin-stand tester used for testing a head-gim2003
Retractable grounding device for a spindle motor2002
Ladder wear protection device1997
Rung lock and latch assembly for an extension ladder1995
Ladder stand-off accessory and rung adapter therefor1994
System for locating and holding a cartridge1993
Rung lock assembly for an extension ladder1992
Rung lock assembly for an extension ladder1992