Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Large-depth underground drainage facility and method of running same

Large-depth underground drainage facility and method of running same

US Patent 5487621 · Granted Jan 30, 1996

Estimated economic value: $312,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Lithium secondary battery pack, as well as electronic device, charging system, a2025
Transfer unit and image forming apparatus therewith2025
Controller apparatus and control method thereof2024
Tracheal tube2024
Information processing apparatus, method for controlling the same, and program2024
Information processing apparatus and control method for controller apparatus2023
Lithium secondary battery pack, as well as electronic device, charging system, a2023
Transfer unit capable of switching between two transfer rollers2023
Transfer unit capable of switching between two transfer rollers and maintaining 2022
Transfer unit capable of switching a transfer roller to one of a size appropriat2022
Transfer unit capable of switching between a plurality of transfer rollers2022
Image forming apparatus and control method for the image forming apparatus for d2022