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US Patent 11501933 Strain sensing key membrane

Patent 11501933 was granted and assigned to Apple (company) on November, 2022 by the United States Patent and Trademark Office.

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Patent attributes

Patent Applicant

Apple (company)

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Current Assignee

Apple (company)

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Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

Patent Inventor Names

Michael Vosgueritchian0

Wenhao Wang0

Vyom Sharma0

Nan Chen0

Ming Gao0

Chia Chi Wu0

Date of Patent

November 15, 2022

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Patent Application Number

165862800

Date Filed

September 27, 2019

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Patent Citations

US Patent 10128062 Strain gauge proportional push button

Patent Citations Received

US Patent 12013304 Electronic force and pressure sensor devices having flexible layers

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US Patent 11942285 Strain sensing key membrane

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US Patent 11885704 Flexible two-dimensional sheet array of electronic sensor devices

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Patent Primary Examiner

Edwin A. Leon Munoz

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CPC Code

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An electronic device has a keyboard with an internal membrane. The membrane has a set of strain gauges configured to respond to a key press, such as when a collapsible dome collapses into contact with the membrane. The strain gauges are connected in a half Wheatstone bridge configuration and are positioned on the membrane in order to limit effects of temperature and subtle flexure of the membrane. The strain gauges are also configured to magnify detection of a resistance differential when a keycap is pressed with sufficient force.

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