|
2022
|
Invention
|
Twisted conduit for geothermal heat exchange. A geothermal heat exchange apparatus is disclosed t... |
|
2013
|
P/S
|
Polyethylene pipe used in geothermal heating and cooling systems |
|
|
Invention
|
Twisted conduit for geothermal heat exchange. A geothermal heat exchange apparatus which is a fle... |
|
2012
|
Invention
|
Twisted conduit for geothermal heating and cooling systems. The present invention relates to a co... |
|
2011
|
Invention
|
Multipipe conduit for geothermal heating and cooling systems. The present invention relates to a ... |