Patent · US Active

Electronic pen with retractable and replaceable cartridge

US8287204B2 · kind B2 · utility

14Cited by

16References

16Claims

0Family size

Assignee

Silverbrook Research Pty Ltd · AU

Inventors

Kia Silverbrook · Sydney, AU
Paul Lapstun · Sydney, AU
Matthew John Underwood · Sydney, AU
Robert John Brice · Sydney, AU
Zsolt Szarka-Kovacs · Sydney, AU

Key dates

Filing date	Jun 3, 2009
Grant date	Oct 16, 2012
Priority date	—
Expiry date	Aug 17, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG06F3/0321
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

An electronic pen comprises a user-replaceable cartridge having a nib, a force sensor for sensing a nib force transmitted axially through the cartridge from the nib and a retraction mechanism for retracting the cartridge. The retraction mechanism comprises a barrel adapted for seating the cartridge in either an extended position or a retracted position, and a first biasing mechanism for biasing the cartridge towards the extended or retracted positions. A second biasing mechanism biases the barrel towards engagement with the force sensor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.