Helmut Seifert
27Patents
9h-index
32Co-inventors
75Inventor score
Filing activity: Dec 8, 1975 → May 19, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6917415B2 | Method of and apparatus for electro-optical distance measurement | Physics | 66 | Expired |
| US7023531B2 | Laser distance measuring device with phase delay measurement | Physics | 56 | Expired |
| US9310197B2 | Measuring device for measuring distance | Physics | 37 | Active |
| US4366934A | Roll-up device for safety belt | Performing Operations; Transporting | 16 | Expired |
| US6781675B2 | Electro-optical para-axial distance measuring system | Physics | 16 | Expired |
| US6603534B2 | Laser range finder for large ranges of measurement with a special receiver | Physics | 13 | Expired |
| US4307852A | Roll-up device for safety belt | Performing Operations; Transporting | 12 | Expired |
| US6950639B2 | Local oscillator for generating an HF signal for direct mixing by using avalanche photodiodes | Physics | 12 | Expired |
| US4277036A | Automatic wind-up roller for a safety belt | Performing Operations; Transporting | 9 | Expired |
| US4258887A | Safety belt roll-up device | Performing Operations; Transporting | 8 | Expired |
| US4618165A | Deflection device for safety belts | Performing Operations; Transporting | 8 | Expired |
| US4318552A | Deflection device for safety belts | Performing Operations; Transporting | 6 | Expired |
| US4369932A | Automatic wind-up roller for a safety belt | Performing Operations; Transporting | 6 | Expired |
| US7456936B2 | Electro-optical hand-held distance measuring instrument | Physics | 5 | Expired |
| US6281968A | Laser distance-measuring instrument for large measuring ranges | Physics | 5 | Expired |
| US7940378B2 | Hand-held laser distance measuring device with a pulse reflection mixing method | Physics | 4 | Active |
| US4508286A | Deflection device for safety belts | Performing Operations; Transporting | 3 | Expired |
| US8467036B2 | Laser instrument for electro-optical distance measurement | Physics | 3 | Active |
| US7548829B2 | Hand-held pulse laser distance measuring device | Physics | 3 | Expired |
| US9261362B2 | Measuring device for distance measurement | Physics | 2 | Active |
| US7714990B2 | Hand-held laser distance measuring device with a pulse reflection mixing method | Physics | 1 | Active |
| US8068215B2 | Laser distance meter | Physics | 1 | Active |
| US5402946A | Exploitation of plastic wastes | Emerging Cross-Sectional Technologies | 1 | Expired |
| US4080130A | Apparatus for extruding, lining and pressing clay blanks | Performing Operations; Transporting | 0 | Expired |
| US8767188B2 | Measuring device for distance measurement | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.