| Number | Name | Date | Kind |
|---|---|---|---|
| 5715164 | Liechti et al. | Feb 1998 | A |
| 5745590 | Pollard | Apr 1998 | A |
| 5778066 | Shah et al. | Jul 1998 | A |
| 5822738 | Shah et al. | Oct 1998 | A |
| 5822739 | Kara | Oct 1998 | A |
| 6240403 | Shah et al. | May 2001 | B1 |
| 6269350 | Shah et al. | Jul 2001 | B1 |
| Number | Date | Country |
|---|---|---|
| 402033715 | Feb 1990 | JP |
| Entry |
|---|
| State of Affairs Postage Meters; Jan. 1998; ISSN: 01645951. |