1
Michael D Maroschak, Frederick P Atchley, Douglas G Everson: Universal septic tank fitting. Plastic Tubing, Duckworth Allen Dyer, July 21, 1987: US04681684 (17 worldwide citation)

A universal septic tank fitting useful as either an inlet sweep or an outlet tee includes a generally tubular member having first and second open ends with a portion of the tubular member adjacent the first end forming an angular bend so that the first end extends generally normal to the member. A t ...


2
Frederic P Atchley, Michael D Maroschak: Drain field system. Plastic Tubing, Allen Dyer Doppelt Franjola & Milbrath, May 14, 1996: US05516229 (15 worldwide citation)

A drain field and a drain field assembly for use with a sewage disposal system are provided that do not require the use of aggregate in the form of rock, gravel, shale, or the like. The assembly contains a distribution pipe having a plurality of holes disposed along its bottom half for receiving liq ...


3
Frederic P Atchley, Michael D Maroschak: Drain field system. Plastic Tubing, Allen Dyer Doppelt Franjola & Milbrath, May 28, 1996: US05520481 (12 worldwide citation)

A drain field and a drain field assembly for use with a sewage disposal system are provided that do not require the use of aggregate in the form of rock, gravel, shale, or the like. The assembly contains a distribution pipe having a plurality of holes disposed along its bottom half for receiving liq ...


4
Michael D Maroschak, Douglas G Everson, Marc H Maroschak, Scott M Thomson: Low-pressure dosing system for sewage disposal and associated methods. Plastic Tubing, Allen Dyer Doppelt Milbrath & Gilchrist P A, February 16, 2010: US07661903 (4 worldwide citation)

A drain field assembly includes a distribution pipe for receiving liquid effluent that has a plurality of holes through the wall. A plurality of generally cylindrical void pipes receive effluent from the distribution pipe, retaining the effluent for a time, and distributing the effluent to an area o ...