Vote by mail envelope that protects privacy of voter's signature
US7581677B2 · kind B2 · utility
0Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2006 |
| Grant date | Sep 1, 2009 |
| Priority date | — |
| Expiry date | Nov 16, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D27/04
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Methods and systems that provide privacy of signatures on envelopes containing ballots are provided. The envelope for returning ballots includes a flap with a window that aligns with a signature area on the envelope. The window appears opaque under normal lighting conditions, but appears transparent when illuminated with light within a predetermined band of wavelengths. To read the signature, light having wavelength within the predetermined band can be directed onto the window, thereby rendering the window transparent and the signature visible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.