Charles Days
17Patents
13h-index
10Co-inventors
71Inventor score
Filing activity: Dec 18, 1990 → Jul 16, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6241622A | Method and apparatus to determine golf ball trajectory and flight | Physics | 129 | Expired |
| US6781621B1 | Launch monitor system with a calibration fixture and a method for use thereof | Human Necessities | 120 | Expired |
| US5471383A | Monitoring systems to measure and display flight characteristics of moving sports object | Human Necessities | 107 | Expired |
| US6500073B1 | Method and apparatus to determine golf ball trajectory and flight | Physics | 102 | Expired |
| US6488591B1 | Method and apparatus to determine golf ball trajectory and flight | Physics | 97 | Expired |
| US6286364A | Method and apparatus for measuring aerodynamic characteristics of a golf ball | Human Necessities | 92 | Expired |
| US5575719A | Method and apparatus to determine object striking instrument movement conditions | Physics | 88 | Expired |
| US5501463A | Method and apparatus to determine object striking instrument movement conditions | Human Necessities | 75 | Expired |
| US5803823A | Method and apparatus to determine object striking instrument movement conditions | Physics | 71 | Expired |
| US6758759B2 | Launch monitor system and a method for use thereof | Human Necessities | 61 | Expired |
| US5054785A | Game ball support device and piezoelectric ball motion detector | Human Necessities | 52 | Expired |
| US6764412B2 | Method and apparatus to determine golf ball trajectory and flight | Physics | 36 | Expired |
| US6616543B1 | Apparatus to determine golf ball trajectory and flight | Physics | 20 | Expired |
| US6571600B2 | Apparatus and method for measurement of coefficient of restitution and contact time | Physics | 12 | Expired |
| US6011359A | Multiple flash/single lamp circuit for fast sequential strobing | Electricity | 10 | Expired |
| US7086955B2 | Method and apparatus to determine golf ball trajectory and flight | Physics | 9 | Expired |
| US7369158B2 | Launch monitor system with a calibration fixture and a method for use thereof | Human Necessities | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.