David R. Sigler
84Patents
9h-index
34Co-inventors
78Inventor score
Filing activity: Dec 3, 1984 → Dec 20, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6861609B2 | Welding electrode for aluminum sheets | Performing Operations; Transporting | 31 | Expired |
| US8250725B2 | Joining polymer workpieces to other components | Emerging Cross-Sectional Technologies | 18 | Active |
| US7833630B2 | Weldable metal composites and methods | Emerging Cross-Sectional Technologies | 15 | Active |
| US9676065B2 | Resistance spot welding of aluminum to aluminum and steel to steel | Performing Operations; Transporting | 14 | Active |
| US8222560B2 | Weld electrode for attractive weld appearance | Chemistry; Metallurgy | 13 | Active |
| US8436269B2 | Welding electrode with contoured face | Emerging Cross-Sectional Technologies | 12 | Active |
| US8525066B2 | Electrode for spot welding | Performing Operations; Transporting | 9 | Active |
| US8274010B2 | Welding electrode with contoured face | Performing Operations; Transporting | 9 | Active |
| US8481170B2 | Composite manufacture | Emerging Cross-Sectional Technologies | 9 | Active |
| US8350179B2 | Application of surface relief to spot welding electrodes | Performing Operations; Transporting | 8 | Active |
| US8833215B2 | Cutting tool for forming and re-forming welding electrodes with contoured faces | Emerging Cross-Sectional Technologies | 8 | Active |
| US8640320B2 | Method of joining by roller hemming and solid state welding and system for same | Emerging Cross-Sectional Technologies | 8 | Active |
| US4588449A | Oxide whisker growth on contaminated aluminum-containing stainless steel foil | Chemistry; Metallurgy | 8 | Expired |
| US9999939B2 | Resistance spot welding steel and aluminum workpieces with electrode insert | Performing Operations; Transporting | 7 | Active |
| US9346118B2 | Forming and re-forming welding electrodes with contoured faces | Emerging Cross-Sectional Technologies | 7 | Active |
| US8927894B2 | Weld electrode for attractive weld appearance | Chemistry; Metallurgy | 6 | Active |
| US8033443B1 | Anvil with rolling elements for friction stir welding | Performing Operations; Transporting | 6 | Active |
| US5294586A | Hydrogen-water vapor pretreatment of Fe-Cr-Al alloys | Chemistry; Metallurgy | 5 | Expired |
| US8590768B2 | Battery tab joint by reaction metallurgy | Emerging Cross-Sectional Technologies | 5 | Active |
| US8643241B2 | End ring assembly and method of forming same | Electricity | 5 | Active |
| US9839971B2 | Resistance spot welding steel and aluminum workpieces with hot welding electrode at aluminum workpiece | Performing Operations; Transporting | 5 | Active |
| US8523045B2 | Method of joining copper conductors | Performing Operations; Transporting | 5 | Active |
| US7258263B2 | Bipolar plate fabrication | Emerging Cross-Sectional Technologies | 5 | Expired |
| US8052029B1 | Method of calibrating a friction stir spot welding system | Performing Operations; Transporting | 5 | Active |
| US4915751A | Accelerated whisker growth on iron-chromium-aluminum alloy foil | Chemistry; Metallurgy | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.