SCHWANDT; Douglas Frank

Patent Applications and Registrations

Patent applications and USPTO patent grants for SCHWANDT; Douglas Frank.The latest application filed is for "systems, methods and apparatus for differential air pressure devices".

Company Profile

2.3.8

SCHWANDT; Douglas Frank - Palo Alto CA

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Systems, Methods And Apparatus For Differential Air Pressure Devices App 20210251841 - WHALEN; Sean Tremaine ; et al.	2021-08-19
Systems, Methods And Apparatus For Differential Air Pressure Devices App 20190099320 - WHALEN; Sean Tremaine ; et al.	2019-04-04
Systems, methods and apparatus for differential air pressure devices Grant 10,004,656 - Whalen , et al. June 26, 2	2018-06-26
Systems, Methods And Apparatus For Differential Air Pressure Devices App 20160242993 - WHALEN; Sean Tremaine ; et al.	2016-08-25
Differential air pressure systems Grant 8,464,716 - Kuehne , et al. June 18, 2	2013-06-18
Systems, Methods And Apparatus For Calibrating Differential Air Pressure Devices App 20120277643 - Whalen; Sean Tremaine ; et al.	2012-11-01
Systems, Methods And Apparatus For Calibrating Differential Air Pressure Devices App 20110098157 - Whalen; Sean Tremaine ; et al.	2011-04-28
Systems, Methods And Apparatus For Differential Air Pressure Devices App 20110098615 - Whalen; Sean Tremaine ; et al.	2011-04-28

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