4 patents
Design
Insulated cover for whole-house fan
26 Jan 21
Robert B. Holland, Grayson M. Griffin
Filed: 7 Sep 18
Design
Foundation vent
4 Jan 21
Richard Fieldhouse
Filed: 22 May 19
Design
Low profile vent
23 Nov 20
Robert B. Holland, Grayson M. Griffin
Filed: 20 Feb 18
Design
Roof vent
11 May 20
Robert B. Holland, Grayson Griffin, Rochelle D. Wellhausen-Grimm
Filed: 12 Jul 18
- Prev
- 1
- Next
Patents are sorted by USPTO publication date, most recent first