Zellweger, Ltd.
22Patents
0Active
22Granted
31Portfolio score
Filing activity: Oct 30, 1973 → Sep 9, 1980
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4007457A | Method of and apparatus for detecting faults in the operation of open-end spinning machines | Performing Operations; Transporting | 34 | Expired |
| US4097692A | Method and apparatus for the two-way transmission of pulses | Electricity | 27 | Expired |
| US4051722A | Method and apparatus for measuring irregularities in the cross-section of yarns, roving, bands and the like | Physics | 22 | Expired |
| US4168604A | Method and apparatus for evaluating yarn signals based on the detection of at least approximately periodic variations in cross section | Performing Operations; Transporting | 17 | Expired |
| US4311958A | Capacitive thread stopping motion | Performing Operations; Transporting | 14 | Expired |
| US3951321A | Method of, apparatus for, transporting yarns through measuring units | Performing Operations; Transporting | 10 | Expired |
| US4051756A | Cutting arrangement | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4007360A | Method and apparatus for remote transmission of signals | Electricity | 7 | Expired |
| US4122657A | Apparatus for monitoring for thread breakage a continuous sequence of work positions on a textile machine | Textiles; Paper | 7 | Expired |
| US3960593A | Method of increasing the long-term stability of a measuring element of textile testers | Physics | 6 | Expired |
| US4152931A | Method and apparatus for evaluating yarn signals having an at least approximately periodic component | Performing Operations; Transporting | 6 | Expired |
| US4340880A | Method and apparatus for signal recognition in a remote control system with influencing of the zero point transition of the alternating-current mains voltage | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4019132A | Method and apparatus for determining the moisture content of different kinds of materials | Physics | 4 | Expired |
| US4015199A | Cell for measurement of the electrical conductivity of liquids | Physics | 4 | Expired |
| US4038723A | Method of and an arrangement for standardizing comber slivers | Textiles; Paper | 4 | Expired |
| US4016790A | Regulation of electronically operated quality control equipment | Emerging Cross-Sectional Technologies | 4 | Expired |
| US3958305A | Method of and an apparatus for uniformalizing combing machine slivers | Textiles; Paper | 4 | Expired |
| US4228814A | Cleaning apparatus for test electrodes | Performing Operations; Transporting | 3 | Expired |
| US3971272A | Regulation of electronically operated quality control equipment | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4319493A | Apparatus for inserting a thread into a testing position of a tensile strength testing apparatus | Physics | 2 | Expired |
| US4338824A | Method of adjusting a given pretension in threads on tensile strength testing apparatus and the like | Physics | 1 | Expired |
| US4343143A | Binding for fiber bundles, a method for the production of the binding and an apparatus for carrying out the method | Performing Operations; Transporting | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.