DD

David E. Daw

HI Hvac Inventors/Systemation: 12 patents #1 of 4Top 25%
Overall (All Time): #283,802 of 4,157,543Top 7%
16
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
12257618 Apparatus and method for closing duct seams and for inserting angle plates and closing duct seams John T. Ehling 2025-03-25
11697147 Apparatus and method for forming duct flanges and duct work John T. Ehling 2023-07-11
11213878 Apparatus and method for forming duct flanges and duct work John T. Ehling 2022-01-04
9937592 Apparatus and method for placement of angle plates in transverse duct flanges Cody B. Umberger 2018-04-10
9925627 Apparatus and method for placement of angle plates in transverse duct flanges Cody B. Umberger 2018-03-27
9545695 Apparatus and method for placement of angle plates in transverse duct flanges Cody B. Umberger 2017-01-17
9377213 Apparatus and method for placement of angle plates in transverse duct flanges Cody B. Umberger 2016-06-28
9157653 Apparatus and method for inserting angle plates and closing duct seams Cody B. Umberger, Michael C. Borwig 2015-10-13
9151513 Apparatus and method for placement of angle plates in transverse duct flanges Cody B. Umberger 2015-10-06
9027376 Apparatus and method for inserting angle plates and closing duct seams Cody B. Umberger, Michael C. Borwig 2015-05-12
8959755 Apparatus and method for placement of angle plates in transverse duct flanges Cody B. Umberger 2015-02-24
8875388 Apparatus and method for placement of angle plates in transverse duct flanges Cody B. Umberger 2014-11-04
7562800 Screw gun William V. Goodhue, David Mathieu 2009-07-21
6988303 Screw gun William V. Goodhue, David Mathieu 2006-01-24
6813977 Screw gun William V. Goodhue, David Mathieu 2004-11-09
4558892 Duct assembly system Arthur F. Vlastnik 1985-12-17