Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Method of and a device for controlling the exchange of rolls of a web-like material

Method of and a device for controlling the exchange of rolls of a web-like material

US Patent 4337903 · Granted Jul 6, 1982

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Pipe inspection device with variable height control2025
Metal complexes2024
Organic electroluminescent device2023
Phenyl derivatives substituted with at least two electron acceptors and at least2023
Watch case2021
Formulations of luminescent compounds2020
Organic compounds with soluble groups2020
Materials for electronic devices2020
Organic electroluminescence device2020
Materials for electronic devices2019
Materials for electronic devices2019
Electronic device having an amine containing layer processed from solution2019