| Hive - Having propolis collector | ||||
|---|---|---|---|---|
| Patent Number | Date | Inventor | Description | |
| 02517419 | 1950 | France | Propolis culture | |
| 02566829 | 1951 | France | Propolis culture | |
| 02681458 | 1954 | France | Propolis culture | |
| 02723402 | 1955 | France | Propolis culture | |
| 04382886 | 1983 | Sosnowski | Method for extracting propolis and water soluble dry propolis powder | |
| 04454616 | 1984 | Robson | Apparatus for collecting propolis from a bee colony | |