David Grewell
20Patents
9h-index
19Co-inventors
72Inventor score
Filing activity: Jan 15, 1992 → Jul 15, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5313034A | Thermoplastic welding | Performing Operations; Transporting | 107 | Expired |
| US5658408A | Method for processing workpieces by ultrasonic energy | Performing Operations; Transporting | 50 | Expired |
| US5855706A | Simultaneous amplitude and force profiling during ultrasonic welding of thermoplastic workpieces | Performing Operations; Transporting | 46 | Expired |
| US6528755B2 | Light guide for laser welding | Physics | 44 | Expired |
| US5772814A | Welding system and method of setting welding machine parameters | Performing Operations; Transporting | 32 | Expired |
| US5846377A | Method for processing workpieces by ultrasonic energy | Performing Operations; Transporting | 30 | Expired |
| US5788791A | Method of determining the collapse of plastic parts | Performing Operations; Transporting | 20 | Expired |
| US6205160A | Laser diode array | Electricity | 14 | Expired |
| US6329629A | Distance mode control for laser welding | Performing Operations; Transporting | 10 | Expired |
| US6486433B2 | Transparent pressure bladder | Performing Operations; Transporting | 9 | Expired |
| US5949959A | Welding method and apparatus | Performing Operations; Transporting | 8 | Expired |
| US7892372B2 | Apparatus and method for ultrasonic processing of laminates | Performing Operations; Transporting | 7 | Active |
| US10442118B2 | Closed loop 3D printing | Performing Operations; Transporting | 5 | Active |
| US9988318B2 | Biodegradable fertilizer | Emerging Cross-Sectional Technologies | 3 | Active |
| US8895778B2 | Depolymerization of polylactic acid | Chemistry; Metallurgy | 2 | Active |
| US6064798A | Welding method and apparatus | Performing Operations; Transporting | 2 | Expired |
| US8172969B2 | Apparatus and method for ultrasonic processing of laminates | Performing Operations; Transporting | 1 | Active |
| US11214714B2 | Thermoplastic poly acrylated glycerol adhesives useful in cellulosic products | Chemistry; Metallurgy | 0 | Active |
| US11359069B2 | Plastic composition with spent filter media filler | Chemistry; Metallurgy | 0 | Active |
| US6867388B2 | Electronic masking laser imaging system | Performing Operations; Transporting | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.