| Number | Name | Date | Kind |
|---|---|---|---|
| 4244660 | Aronson | Jan 1981 |
| Number | Date | Country |
|---|---|---|
| 2380889 | Oct 1978 | FRX |
| Entry |
|---|
| Pages M288-M302, Sea Gate Office Products 1991 Catalog. |
| Pages 6 and 7, 1990 Catalog of Carstens Health Industries, Inc. |
| 1991 General Catalog-patient Charting Equipment and Supplies of First Hospital Products, Inc. |