Closed Circulating System Patents (Class 210/167.01)
- With means to add treating material (Class 210/167.11)
- Separator external to swimming pool or spa (Class 210/167.12)
- Separator for use on swimming pool or spa bottom and separator for use at water surface (Class 210/167.15)
- Separator for use on swimming pool or spa bottom (Class 210/167.16)
- Skimmer arm at skimmer opening at water surface (Class 210/167.18)
- Mesh or screen filter at or near water surface (Class 210/167.19)
- Separator using living organism (Class 210/167.22)
- Separator or part thereof associated with bottom of aquarium (e.g., means positioned under gravel, etc.) (Class 210/167.23)
- Particulate filter or particulate sorbent (Class 210/167.25)
- Separator with aerator (Class 210/167.26)
- Separator mounted on top edge of aquarium wall (Class 210/167.27)