Frank Koch
37Patents
11h-index
38Co-inventors
75Inventor score
Filing activity: Oct 23, 1981 → Mar 17, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5343146A | Combination coating thickness gauge using a magnetic flux density sensor and an eddy current search coil | Physics | 77 | Expired |
| US5632740A | Illuminated leading probe device | Emerging Cross-Sectional Technologies | 54 | Expired |
| USRE35703E | Combination coating thickness gauge using a magnetic flux density sensor and an eddy current search coil | General | 44 | Expired |
| US5723791A | High resolution ultrasonic coating thickness gauge | Physics | 43 | Expired |
| US5241280A | Coating thickness measurement gauge | Physics | 40 | Expired |
| US4567436A | Magnetic thickness gauge with adjustable probe | Emerging Cross-Sectional Technologies | 35 | Expired |
| US5397027A | Stopper for a metered dispensing unit | Physics | 21 | Expired |
| US5293132A | Coating thickness measurement gauge | Physics | 20 | Expired |
| US5930744A | Coating thickness gauge | Physics | 19 | Expired |
| US6135779A | Contact for a conductor on a foil | Electricity | 14 | Expired |
| US6282962A | High resolution ultrasonic thickness gauge | Physics | 11 | Expired |
| US5094009A | Gauge for measuring the thickness of a coating on a substrate | Physics | 10 | Expired |
| US5623427A | Nondestructive anodic capacity gauge | Physics | 10 | Expired |
| USD278211S | Coating thickness gage | General | 9 | Expired |
| USD331201S | Coating thickness measurement gauge | General | 8 | Expired |
| US4433290A | Magnetic coating thickness comparator having parallel magnetic rods with nonmagnetic slide indicators | Physics | 7 | Expired |
| US4733178A | Magnetic thickness gauge with third support | Performing Operations; Transporting | 7 | Expired |
| US8098862B2 | Hearing apparatus with a special charging circuit | Electricity | 6 | Active |
| US6250160A | High resolution ultrasonic thickness gauge | Physics | 6 | Expired |
| US6050140A | Adhesion tester | Physics | 6 | Expired |
| US9014407B2 | Hearing instrument system with a rechargeable battery | Emerging Cross-Sectional Technologies | 5 | Active |
| US4599562A | Method and apparatus for magnetically measuring a coating with a plurality of magnets | Physics | 5 | Expired |
| US4859127A | Spring wire fastener and method of using same | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6405088B1 | Telemetry coil arrangement for receiving data signals in particular from cardiologic implants | Physics | 4 | Expired |
| US4741426A | Coin acceptor for vending machine | Physics | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.