|
US1142270A
|
|
Filter.
|
|
US1088929A
|
|
Filter.
|
|
GB191124143A
|
|
Improvements in and relating to Pressure Equalising Devices for Fluids.
|
|
US1009857A
|
|
Water-purifying apparatus.
|
|
US938075A
|
|
Water-purifying apparatus.
|
|
GB190818355A
|
|
Process and Apparatus for Removing Iron from Water by Means of Air
|
|
GB190802077A
|
|
Improved Process and Apparatus for Clarifying Water
|
|
GB190618269A
|
|
Improved Process and Apparatus for Washing Loose Filtering Media.
|
|
GB190614339A
|
|
Improvements relating to the Purification of Water.
|
|
GB190300967A
|
|
Improvements in Processes and Devices for the Production of Lime Water and the like, and for Purification of Water.
|
|
GB190216965A
|
|
A New or Improved Method of Purifying Water.
|
|
US713800A
|
|
Process of removing sulfuric acid from water.
|
|
US748308A
|
|
Apparatus for the removal of sulfuric acid from water.
|
|
US673062A
|
|
Rotary water-meter.
|
|
US671492A
|
|
Apparatus for purifying water.
|
|
US648054A
|
|
Water-meter.
|
|
GB189910586A
|
|
A New Process of and Means for Automatically Cleansing Filter Material.
|
|
US630988A
|
|
Filter.
|
|
GB189905929A
|
|
An Improved Water Meter.
|
|
GB189730480A
|
|
Improvements in Water Meters.
|
