Patents by Inventor Chen-Chao Chang
Chen-Chao Chang 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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Publication number: 20240124643Abstract: A method for producing a polyester polyol is provided, which includes: feeding a first antioxidant and a raw material reactant that includes a polyacid and a polyol into a reactor; subjecting the polyacid and the polyol to an esterification reaction to form an oligomer; and performing a prepolymerization reaction on the oligomer to obtain a prepolymerization reactant. During the prepolymerization reaction, the method includes sampling and monitoring an acid value of the prepolymerization reactant. When the acid value of the prepolymerization reactant reaches a first acid value, an esterification reaction catalyst is added to the prepolymerization reactant for carrying out a polycondensation reaction and generating a polycondensation reactant that contains the polyester polyol. During the polycondensation reaction, the method includes sampling and monitoring an acid value of the polycondensation reactant.Type: ApplicationFiled: November 30, 2022Publication date: April 18, 2024Inventors: TE-CHAO LIAO, HAN-CHING HSU, CHEN-WEI CHANG
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Patent number: 11942652Abstract: The disclosure provides a limit device and a robot using the same. The limit device comprises a first connecting member, a transmission rod and a second connecting member. The first connecting member comprising a first main body portion and two first connecting elements. The two first connecting elements are arranged at intervals. The two first connecting elements are respectively connected to the first main body. The transmission rod comprising a first end and a second end. The first end and the second end are arranged at intervals. The first end penetrates through one of the two first connecting elements. The second end penetrates through the other one of the two first connecting element. The second connecting member provided with two indexing buckles. The two indexing buckles are arranged at intervals, each of the indexing buckles comprises a first limiting groove and a second limiting groove.Type: GrantFiled: April 13, 2022Date of Patent: March 26, 2024Assignees: Futaijing Precision Electronics (Yantai) Co., Ltd., HON HAI PRECISION INDUSTRY CO., LTD.Inventors: Chen-Ting Kao, Chi-Cheng Wen, Yu-Sheng Chang, Chih-Cheng Lee, Chiung-Hsiang Wu, Sheng-Li Yen, Yu-Cheng Zhang, Chang-Ju Hsieh, Chen Chao
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Patent number: 10636416Abstract: A network device is connected to user device and includes a processor and a memory storing executable code executed by the processor. The network device is configured to receive first keyword data and speech data followed by the first keyword data; determine whether the first keyword data corresponds to a first keyword; in response to determining that the first keyword data corresponds to the first keyword, recognize word information from the speech data to generate at least one word recognition result; send the at least one word recognition result through a first communication path to a first network; and in response to determining that the first keyword data corresponds to a second keyword, stop recognizing the word information from the speech data followed by the first keyword data, and send the speech data through a second communication path to the first user device.Type: GrantFiled: November 15, 2018Date of Patent: April 28, 2020Assignee: WISTRON NEWEB CORPORATIONInventors: Yee-Lee Shyong, Chen-Chao Chang, Ying-Hui Liang
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Publication number: 20190244602Abstract: A network device is connected to user device and includes a processor and a memory storing executable code executed by the processor. The network device is configured to receive first keyword data and speech data followed by the first keyword data; determine whether the first keyword data corresponds to a first keyword; in response to determining that the first keyword data corresponds to the first keyword, recognize word information from the speech data to generate at least one word recognition result; send the at least one word recognition result through a first communication path to a first network; and in response to determining that the first keyword data corresponds to a second keyword, stop recognizing the word information from the speech data followed by the first keyword data, and send the speech data through a second communication path to the first user device.Type: ApplicationFiled: November 15, 2018Publication date: August 8, 2019Inventors: YEE-LEE SHYONG, CHEN-CHAO CHANG, YING-HUI LIANG
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Patent number: 9544123Abstract: The present invention provides an electronic device including a coupler, a noise-estimation apparatus and an assembly unit. The coupler receives a baseband signal. The noise-estimation apparatus receives the baseband signal and subtracts a predetermined synchronization preamble from the baseband signal to obtain a noise-estimation signal, and the predetermined synchronization preamble is a transmission signal that conforms to the standards of 802.11bg and/or IEEE 802.11n. The assembly unit receives the baseband signal and subtracts a noise-estimation signal from the baseband signal to obtain an output signal.Type: GrantFiled: August 14, 2013Date of Patent: January 10, 2017Assignee: WISTRON NEWEB CORP.Inventors: Chen-Chao Chang, Yung-Cheng Lin
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Publication number: 20150280773Abstract: An antenna distribution controller including a plurality of antenna connectors, at least one device connector, an antenna switching circuit and a controller is provided. The antenna connector is configured to connect an external antenna. The device connector is configured to connect an external wireless communication device. The antenna switching circuit has a plurality of antenna ports and at least one device port. These antenna ports are coupled to one of the antenna connectors, respectively. The device port is coupled to the device connector. The controller is coupled to a control terminal of the antenna switching circuit for controlling an electrical connection relationship between the antenna ports and the device port.Type: ApplicationFiled: May 19, 2014Publication date: October 1, 2015Applicant: Wistron NeWeb Corp.Inventors: Chen-Chao Chang, Yung-Cheng Lin
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Publication number: 20140269607Abstract: The present invention provides an electronic device including a coupler, a noise-estimation apparatus and an assembly unit. The coupler receives a baseband signal. The noise-estimation apparatus receives the baseband signal and subtracts a predetermined synchronization preamble from the baseband signal to obtain a noise-estimation signal, and the predetermined synchronization preamble is a transmission signal that conforms to the standards of 802.11bg and/or IEEE 802.11n. The assembly unit receives the baseband signal and subtracts a noise-estimation signal from the baseband signal to obtain an output signal.Type: ApplicationFiled: August 14, 2013Publication date: September 18, 2014Applicant: Wistron NeWeb Corp.Inventors: Chen-Chao CHANG, Yung-Cheng LIN
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Patent number: 8661281Abstract: A USB HUB is provided. The USB HUB comprises a wireless communication module, a storage module, a USB interface connected to a host outside of the USB HUB and a HUB controller. The storage module stores a driver program of the wireless communication module. The USB interface transfers data with the host. The HUB controller is coupled to the USB interface, the wireless communication module and the storage module. The HUB controller disables the storage module and enables the wireless communication module when the driver program has been installed in the host.Type: GrantFiled: March 8, 2011Date of Patent: February 25, 2014Assignee: Wistron NeWeb Corp.Inventors: Chen-Chao Chang, Ling-Sheng Yang, Chih-Chiang Chang
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Publication number: 20120327929Abstract: A connection switching device for a telephone device supporting a PSTN function and a VoIP function and taking the PSTN function as a default voice communication function is disclosed. The connection switching device includes a dual tone multi-frequency (DTMF) receiver for determining whether a phone number inputted to the telephone device includes a specified trigger code, and a control unit coupled to the DTMF receiver for switching the default voice communication function from the PSTN function to the VoIP function when a decision result of the DTMF receiver indicates that the phone number includes the specified trigger code.Type: ApplicationFiled: September 20, 2011Publication date: December 27, 2012Inventors: Chen-Chao Chang, Jung-Cheng Lee, Yee-Lee Shyong
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Publication number: 20120144213Abstract: A USB HUB is provided. The USB HUB comprises a wireless communication module, a storage module, a USB interface connected to a host outside of the USB HUB and a HUB controller. The storage module stores a driver program of the wireless communication module. The USB interface transfers data with the host. The HUB controller is coupled to the USB interface, the wireless communication module and the storage module. The HUB controller disables the storage module and enables the wireless communication module when the driver program has been installed in the host.Type: ApplicationFiled: March 8, 2011Publication date: June 7, 2012Applicant: Wistron Neweb Corp.Inventors: Chen-Chao Chang, Ling-Sheng Yang, Chih-Chiang Chang