Handheld audience response device
USD612850S1 · kind S1 · design
40Cited by
21References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 4, 2007 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Mar 30, 2024 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.