Helgeson; Andrew
Patent Applications and Registrations
Patent applications and USPTO patent grants for Helgeson; Andrew.The latest application filed is for "variable volume floor diffuser with attachment means".
- Helgeson; Andrew - Kansas City KS
| Patent | Date |
|---|---|
| Variable volume floor diffuser with attachment means Grant 7,950,988 - Demster , et al. May 31, 2 | 2011-05-31 |
| Variable Volume Floor Diffuser With Attachment Means App 20080119128 - Demster; Stan ; et al. | 2008-05-22 |
| Variable air volume time modulated floor terminal App 20070066213 - Helgeson; Andrew ; et al. | 2007-03-22 |
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