David M. Crookham
15Patents
9h-index
14Co-inventors
69Inventor score
Filing activity: Apr 12, 1991 → Jan 20, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5207747A | Mobile lighting system | Mechanical Engineering; Lighting; Heating | 83 | Expired |
| US8194914B1 | Encoding and decoding data into an image using identifiable marks and encoded elements | Physics | 39 | Active |
| US6464196B1 | Apparatus and method for a temporary spread footing | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US8094870B2 | Encoding and decoding data in an image | Physics | 29 | Active |
| US5944413A | Apparatus and method for moveable lighting | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US5313378A | Mobile lighting system | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US7182547B1 | Bollard lamp | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US7325998B2 | Bollard lamp | Mechanical Engineering; Lighting; Heating | 11 | Active |
| USD607592S1 | Combined bollard and light fixture | General | 9 | Expired |
| US7246782B2 | Apparatus and method for a temporary spread footing | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| USD572397S1 | Combined bollard and light fixture | General | 5 | Expired |
| US7077598B1 | Bollard and method of mounting | Fixed Constructions | 4 | Expired |
| US8462986B2 | Encoding and decoding data in an image for social networking communication | Physics | 3 | Active |
| US8971566B2 | Marketing campaign platform | Physics | 0 | Active |
| US9336474B2 | Identification and purchasing platform | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.