Doylestown, Ohio
United States
7
2021-01-07
The entities that hold a legal rights for patent applications filed by inventor Daus Mark:
Mark Daus from Doylestown, US has applied for patents for these inventions. The list has both pending applications and granted patents:
Spring array and method for door counterbalancing
#2 | 2016-08-25Door release mechanism
#3 | 2015-12-08Counterbalance system for vertical acting doors
#4 | 2014-09-11Door release mechanism
#5 | 2013-10-17Door release mechanism
#6 | 2011-05-05Door release mechanisim
#7 | 2009-04-30Door release mechanism
481847 ⎘