David L. Knierim
89Patents
17h-index
88Co-inventors
87Inventor score
Filing activity: Mar 7, 1983 → Feb 17, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5185599A | Local display bus architecture and communications method for Raster display | Physics | 86 | Expired |
| US4742474A | Variable access frame buffer memory | Physics | 68 | Expired |
| US5109520A | Image frame buffer access speedup by providing multiple buffer controllers each containing command FIFO buffers | Physics | 57 | Expired |
| US7296882B2 | Ink jet printer performance adjustment | Performing Operations; Transporting | 53 | Expired |
| US4586037A | Raster display smooth line generation | Physics | 47 | Expired |
| US4755810A | Frame buffer memory | Physics | 43 | Expired |
| US5689288A | Ink level sensor | Performing Operations; Transporting | 38 | Expired |
| US5600352A | Apparatus and method for controlling coalescence of ink drops on a print medium | Physics | 36 | Expired |
| US5517534A | Phase locked loop with reduced phase noise | Electricity | 35 | Expired |
| US9789697B1 | Fluid level sensor with combined capacitance and conductance | Emerging Cross-Sectional Technologies | 35 | Active |
| US5502468A | Ink jet print head drive with normalization | Performing Operations; Transporting | 33 | Expired |
| US5659587A | Spread spectrum phase-locked loop clock generator with VCO driven by a symmetrical voltage ramp signal | Electricity | 31 | Expired |
| US4823301A | Method and circuit for computing reciprocals | Physics | 27 | Expired |
| US4646078A | Graphics display rapid pattern fill using undisplayed frame buffer memory | Physics | 25 | Expired |
| US4780755A | Frame buffer self-test | Physics | 22 | Expired |
| US8149017B2 | Low-voltage to high-voltage level translation using capacitive coupling | Electricity | 18 | Active |
| US7243917B2 | Print media registration using active tracking of idler rotation | Performing Operations; Transporting | 17 | Expired |
| US6076922A | Method and apparatus for generating a dot clock signal for controlling operation of a print head | Electricity | 16 | Expired |
| US8205971B2 | Electrically grounded inkjet ejector and method for making an electrically grounded inkjet ejector | Performing Operations; Transporting | 11 | Active |
| US7556326B2 | Ink level sensor and method of use | Physics | 11 | Active |
| US6972403B2 | Position encoder | Performing Operations; Transporting | 9 | Expired |
| US7575293B2 | Dual drop printing mode using full length waveforms to achieve head drop mass differences | Performing Operations; Transporting | 9 | Active |
| US5296792A | Bidirectional chopper transconductance amplifier | Electricity | 8 | Expired |
| US7021739B2 | Ink jet processes | Performing Operations; Transporting | 8 | Expired |
| US5235413A | Method and apparatus for processing component signals to preserve high frequency intensity information | Electricity | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.