Patents by Inventor Chih-Jen Li
Chih-Jen Li has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11962100Abstract: A dual-band antenna module includes a first antenna structure and a second antenna structure. The first antenna structure includes a first insulating substrate, a conductive metal layer, a plurality of grounding supports, and a first feeding pin. The second antenna structure includes a second insulating substrate, a top metal layer, a bottom metal layer, and a second feeding pin. The conductive metal layer is disposed on the first insulating substrate. The grounding supports are configured for supporting the first insulating substrate. The second insulating substrate is disposed above the first insulating substrate. The top metal layer and the bottom metal layer are respectively disposed on a top side and a bottom side of the second insulating substrate. The first frequency band signal transmitted or received by the first antenna structure is smaller than the second frequency band signal transmitted or received by the second antenna structure.Type: GrantFiled: August 7, 2022Date of Patent: April 16, 2024Assignee: Taiwan Inpaq electronic Co., Ltd.Inventors: Ta-Fu Cheng, Shou-Jen Li, Cheng-Yi Wang, Chih-Ming Su
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Publication number: 20230052012Abstract: An electric treadmill includes a motor and a motor driving circuit. The motor driving circuit is operable to control electric current flow from a positive electrode through the motor to a negative electrode to drive the motor. The motor driving circuit has a switch path connected between the positive electrode and the negative electrode. The switch path has a resistance element and a switch element connected in series. When the motor driving circuit receives power from the external power source, the switch element will automatically switch to an open state so that the resistance element is inactive; and when the motor driving circuit does not receive power from the external power source, the switch element will automatically switch to an closed state so that the resistance element is operated to provide a resistive load for stopping rotation of the endless belt.Type: ApplicationFiled: October 25, 2022Publication date: February 16, 2023Inventors: Chih-Jen Li, Jhih-Sheng Fang
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Patent number: 11524207Abstract: An electric treadmill includes a motor and a motor driving circuit. The motor driving circuit is operable to control electric current flow from a positive electrode through the motor to a negative electrode to drive the motor. The motor driving circuit has a switch path connected between the positive electrode and the negative electrode. The switch path has a resistance element and a switch element connected in series. When the motor driving circuit receives power, the switch element will be switched to a disconnected state, so that the resistance element is inactive. When the motor driving circuit does not receive power, the switch element will be switched to a connected state, so that the resistance element becomes a load between the positive electrode and the negative electrode for consuming power generated by the motor when the endless belt is driven to rotate by an external force.Type: GrantFiled: October 29, 2020Date of Patent: December 13, 2022Assignee: Johnson Health Tech Co., Ltd.Inventors: Chih-Jen Li, Jhih-Sheng Fang
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Publication number: 20210138299Abstract: An electric treadmill includes a motor and a motor driving circuit. The motor driving circuit is operable to control electric current flow from a positive electrode through the motor to a negative electrode to drive the motor. The motor driving circuit has a switch path connected between the positive electrode and the negative electrode. The switch path has a resistance element and a switch element connected in series. When the motor driving circuit receives power, the switch element will be switched to a disconnected state, so that the resistance element is inactive. When the motor driving circuit does not receive power, the switch element will be switched to a connected state, so that the resistance element becomes a load between the positive electrode and the negative electrode for consuming power generated by the motor when the endless belt is driven to rotate by an external force.Type: ApplicationFiled: October 29, 2020Publication date: May 13, 2021Inventors: Chih-Jen Li, Jhih-Sheng Fang
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Patent number: 9207784Abstract: An electromagnetic pressure-sensitive pointer is disclosed. The electromagnetic pointer comprises a pen core and an oscillating circuit. The pointer core has a pointer tip. The oscillating circuit comprises a plurality of conductive terminals and a conductor. A capacitance of the oscillating circuit is increased through the contact between the conductive terminals and the conductor as a force is applied upon the pointer tip. When pointer's tip is been pressed, the pointer's frequency will have an obvious transition while its pressure-sensitivity is maintained.Type: GrantFiled: January 22, 2013Date of Patent: December 8, 2015Assignee: Wacom Co., Ltd.Inventors: A-Li Wong, Chih-Jen Li, Chia-Jui Yeh
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Patent number: 9152250Abstract: An electromagnetic pointer with a new type adjustment structure is disclosed. The electromagnetic pointer comprises at least one pen tube assembly, a tuning component at one end of the pen tube assembly, a pen tip, a core holder configured in the pen tube assembly with a surrounding coil, a ferrite core, an elastomer, a touch pin configured in the core holder and the pen tube assembly and a circuit board. The tuning component is configured to move axially along the pen tube assembly to perform tuning.Type: GrantFiled: July 22, 2013Date of Patent: October 6, 2015Assignee: Wacom Co., Ltd.Inventors: Chih-Jen Li, Chien-Chia Lien, A-Li Wong
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Publication number: 20140152627Abstract: An electromagnetic pressure-sensitive pointer is disclosed. The electromagnetic pointer comprises a pen core and an oscillating circuit. The pointer core has a pointer tip. The oscillating circuit comprises a plurality of conductive terminals and a conductor. A capacitance of the oscillating circuit is increased through the contact between the conductive terminals and the conductor as a force is applied upon the pointer tip. When pointer's tip is been pressed, the pointer's frequency will have an obvious transition while its pressure-sensitivity is maintained.Type: ApplicationFiled: January 22, 2013Publication date: June 5, 2014Applicant: WALTOP INTERNATIONAL CORPORATIONInventors: A-Li Wong, CHIH-JEN LI, CHIA-JUI YEH
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Publication number: 20140125638Abstract: An electromagnetic pointer is disclosed. The electromagnetic pointer includes at least one pen tube assembly, a pen tip, a core holder configured in the pen tube assembly with a surrounding coil, a ferrite core, an elastomer, a touch pin configured in the core holder and the pen tube assembly and a circuit board.Type: ApplicationFiled: March 29, 2013Publication date: May 8, 2014Applicant: WALTOP INTERNATIONAL CORPORATIONInventor: CHIH-JEN LI
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Publication number: 20140055425Abstract: An electromagnetic pointer with a new type adjustment structure is disclosed. The electromagnetic pointer comprises at least one pen tube assembly, a tuning component at one end of the pen tube assembly, a pen tip, a core holder configured in the pen tube assembly with a surrounding coil, a ferrite core, an elastomer, a touch pin configured in the core holder and the pen tube assembly and a circuit board. The tuning component is configured to move axially along the pen tube assembly to perform tuning.Type: ApplicationFiled: July 22, 2013Publication date: February 27, 2014Applicant: WALTOP INTERNATIONAL CORPORATIONInventors: Chih-Jen LI, Chien-Chia LIEN, A-Li Wong
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Patent number: 8445742Abstract: A process for producing a wound dressing was provided having steps of: spinning an aqueous stock containing natural polymeric materials into a spin formation solution to form a wet polymeric spin; immersing the wet polymeric fiber into a softening reagent to obtain a softened wet polymeric spin; immersing the softened wet polymeric spin into a volatile reagent to expelling moisture in the softened wet polymeric fiber to form a polymeric fiber; forming a non-woven fabric of the polymeric fiber; and treating the non-woven fabric of the polymeric fiber with a coating solution to form a porous coating on the polymeric fiber to obtain a wound dressing. A process for manufacturing a polymeric fiber is also provided. A wound dressing produced by the process is also provided.Type: GrantFiled: May 26, 2010Date of Patent: May 21, 2013Assignee: Coreleader Biotech Co., Ltd.Inventors: Ta-Jen Wu, Chih-Jen Li, Chi-Sheng Chu
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Publication number: 20110295172Abstract: A process for producing a wound dressing was provided having steps of: spinning an aqueous stock containing natural polymeric materials into a spin formation solution to form a wet polymeric spin; immersing the wet polymeric fiber into a softening reagent to obtain a softened wet polymeric spin; immersing the softened wet polymeric spin into a volatile reagent to expelling moisture in the softened wet polymeric fiber to form a polymeric fiber; forming a non-woven fabric of the polymeric fiber; and treating the non-woven fabric of the polymeric fiber with a coating solution to form a porous coating on the polymeric fiber to obtain a wound dressing. A process for manufacturing a polymeric fiber is also provided. A wound dressing produced by the process is also provided.Type: ApplicationFiled: May 26, 2010Publication date: December 1, 2011Applicant: CORELEADER BIOTECH CO., LTD.Inventors: TA-JEN WU, CHIH-JEN LI, CHI-SHENG CHU
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Publication number: 20110084846Abstract: An electromagnetic whiteboard pen is disclosed, and particular an electromagnetic whiteboard pen capable of inking and digital inputting simultaneously is disclosed. The electromagnetic whiteboard pen has a marker for writing with ink and a coil for emitting electromagnetic signals. When user writes on an electromagnetic whiteboard by the marker, the coil emitting electromagnetic signals simultaneously. The electromagnetic whiteboard senses the electromagnetic signals to find and record the position and the moving of the electromagnetic whiteboard pen. Therefore, the writing on the electromagnetic whiteboard by inking can be record and converted to be digital signals for storing by the electromagnetic whiteboard when the electromagnetic whiteboard pen writes on the electromagnetic whiteboard.Type: ApplicationFiled: November 12, 2009Publication date: April 14, 2011Applicant: WALTOP INTERNATIONAL CORPORATIONInventors: Chih-Jen Li, Yan-Chin Hsu, Cheng-Lu Liu
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Publication number: 20080031736Abstract: A structure of a fan capable of reducing vibration is disclosed. The fan has a base and a fan pivotally connected to the base. The base has axial sleeve concentrically surrounding least one axle. The fan is connected to an axis from inside. The axis has a resilient element is positioned around an end of the axis, another end of the axis has a neck concentrically surrounded by at least one buffer. Thus, the resilient element and the buffer can reduce the vibration generated by the fan.Type: ApplicationFiled: August 7, 2006Publication date: February 7, 2008Applicant: ASIA VITAL COMPONENTS CO., LTD.Inventors: Yi-Hung Liao, Chih-Jen Li
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Patent number: D715297Type: GrantFiled: November 13, 2012Date of Patent: October 14, 2014Assignee: Waltop International CorporationInventor: Chih-Jen Li