Stephen Jay Shellhammer
125Patents
21h-index
125Co-inventors
93Inventor score
Filing activity: Aug 22, 1990 → Dec 20, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5319181A | Method and apparatus for decoding two-dimensional bar code using CCD/CMD camera | Physics | 390 | Expired |
| US5635697A | Method and apparatus for decoding two-dimensional bar code | Physics | 269 | Expired |
| US8290503B2 | Multichannel dynamic frequency selection | Electricity | 264 | Active |
| US8027690B2 | Methods and apparatus for sensing the presence of a transmission signal in a wireless channel | Electricity | 169 | Active |
| US6672506B2 | Statistical sampling security methodology for self-scanning checkout system | Physics | 168 | Expired |
| US8463195B2 | Methods and apparatus for spectrum sensing of signal features in a wireless channel | Electricity | 168 | Active |
| US6853293B2 | Wearable communication system | Physics | 164 | Expired |
| US5138140A | Signature capture using electro-optical scanning | Electricity | 129 | Expired |
| US7039358B1 | Coexistence techniques in wireless networks | Emerging Cross-Sectional Technologies | 127 | Expired |
| US6783071B2 | Scanner pairing in a bluetooth POS network | Electricity | 94 | Expired |
| US5523552A | Method and apparatus to scan randomly oriented two-dimensional bar code symbols | Physics | 54 | Expired |
| US6672511B1 | Omnidirectional reading of two-dimensional symbols | Physics | 49 | Expired |
| US6164540A | Optical scanners | Physics | 46 | Expired |
| US5444231A | Bar code scan stitching | Physics | 45 | Expired |
| US6209788A | Optical scanners | Physics | 39 | Expired |
| US6764012B2 | Signaling arrangement for and method of signaling in a wireless local area network | Physics | 38 | Expired |
| US6082621A | Interface between threshold processing digitizer for bar code reader | Physics | 35 | Expired |
| US5988505A | Omnidirectional reading of two-dimensional symbols | Physics | 33 | Expired |
| US6092725A | Statistical sampling security methodology for self-scanning checkout system | Physics | 22 | Expired |
| US9525540B1 | Embedded wake-up signaling | Emerging Cross-Sectional Technologies | 21 | Active |
| US5734152A | Optical scanners and signal processors therefor | Physics | 21 | Expired |
| US7047051B2 | Method of and arrangement for minimizing power consumption and data latency of an electro-optical reader in a wireless network | Emerging Cross-Sectional Technologies | 20 | Expired |
| US8774209B2 | Apparatus and method for spectrum sharing using listen-before-talk with quiet periods | Electricity | 12 | Active |
| US7007846B2 | Omnidirectional reading of two-dimensional symbols | Physics | 11 | Expired |
| US9609520B2 | Methods and apparatuses for communicating in television white space (TVWS) based on TVWS enablement signal | Electricity | 11 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.