Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Method for measuring film thickness

Method for measuring film thickness

US Patent 4991969 · Granted Feb 12, 1991

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Spinning and sliding detection device and spinning and sliding detection method2025
On-board apparatus, ground apparatus, and train control system2025
Train control system and obstacle detection device2024
Movable contact, variable resistor, and method for manufacturing movable contact2023
Train operation control apparatus, operation management apparatus, train control2023
Train control system, ground control apparatus, and on-board control apparatus2023
On-board control apparatus and platform-door control system2022
Ground base device, unmanned operation system, operation system, and unmanned op2022
Speed control device, wireless train control system, and speed control method2021
Train operation control system and train operation control method2021
Speed control device2020
Perfume retainer member and aroma provision device2020