We are X-Tirp Inc. We started the company in Portland, Oregon, with a mission: extirpate invasive species. There are two of us, Phil Doberenz, Inventor and Chief Technical Wizard, and Tammy Evans, President.
How do you Invent an Ivy-Ripper?
is: You Care.
You spend a lot of time on it. Invest your life savings in it.
You do it because you care about how we humans have planted it and by letting it get away, have altered our landscapes, and you want to be a part of restoring them.
You do it because you’ve been out there on cold
You do it once and fail.
Do it again – and fail. And again… and keep that up until
Then you assemble them, and you test and test.
You squeeze the costs wherever you can – and the time it takes to cast and finish the parts.
Some tests work better than others. Some parts break or clot up with dirt and twigs.
Some people who volunteer to test are more impressed than others. You write down their criticisms and try again – grind, drill, mold, and cast.
And sometimes it just rains.
But eventually, after you have simplified drastically, you get one that works – even works well. And you want to let the world know about it.
So we are. Now You can sign up on our Contacts Page and get updates about the new Ivy-Ripper v. 14.2. And if you are in the Pacific Northwest (US), ask for a free demonstration.
Bio of Phil Doberenz, CEO and Chief Technical Officer
Phil Doberenz set out to invent tools to reverse the spread of invasive species – all kind
Since then he has also been selected as a Runner Up in the contest sponsored by the Michigan Department of Fish and Wildlife for a sonic device to prevent Asian Carp from invading the Great Lakes.
Phil lives in Tigard, Oregon, a suburb of Portland, where we make the Ivy-Ripper.
Now, after 13 versions of the Ivy Ripper that have grown progressively more complex, he has radically simplified its design and is producing the Ivy Ripper v. 14.2, fabricating it part by part, some sheet metal, some 3-D printed, some molded fiberglass, and the tether from Dyneema, a fabric stronger than steel. As of October 19, 2018, he filed for a patent on Ivy-Ripper version 14.2. I