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    Evolving new molecular function
    72.
    发明申请
    Evolving new molecular function 有权

    公开(公告)号：US20050025766A1

    公开(公告)日：2005-02-03

    申请号：US10744605

    申请日：2003-12-23

    Applicant: David Liu ,  Zev Gartner ,  Matthew Kanan

    Inventor： David Liu ,  Zev Gartner ,  Matthew Kanan

    IPC: C12N15/09 ,  C07B61/00 ,  C08G85/00 ,  C12N15/10 ,  C12P1/00 ,  C12P19/34 ,  C12P21/00 ,  A61K39/395

    CPC classification number: C12N15/1068 ,  C12P1/00 ,  C12P19/34 ,  C12P21/00

    Abstract: Nature evolves biological molecules such as proteins through iterated rounds of diversification, selection, and amplification. The present invention provides methods, compositions, and systems for synthesizing, selecting, amplifying, and evolving non-natural molecules based on nucleic acid templates. The sequence of a nucleic acid template is used to direct the synthesis of non-natural molecules such as unnatural polymers and small molecules. Using this method combinatorial libraries of these molecules can be prepared and screened. Upon selection of a molecule, its encoding nucleic acid template may be amplified and/or evolved to yield the same molecule or related molecules for re-screening. The inventive methods and compositions of the present invention allow for the amplification and evolution of non-natural molecules in a manner analogous to the amplification of natural biopolymer such as polynucleotides and protein.

    Stereo view reflection corneal topography
    73.
    发明授权
    Stereo view reflection corneal topography 失效

    公开(公告)号：US06607273B2

    公开(公告)日：2003-08-19

    申请号：US09978657

    申请日：2001-10-18

    Applicant: Ed Sarver ,  David Liu

    Inventor： Ed Sarver ,  David Liu

    IPC: A61B310

    CPC classification number: A61B3/107

    Abstract: A stereo target corneal topography apparatus and method that uses two differently angled views of a target pattern reflected from a cornea to measure the shape of a cornea using a stereo reconstruction module to reconstruct the shape of a surface of a cornea. The surface elevation, surface slope and/or surface power may be determined without the need to make an initial assumption about the shape of the cornea.

    Boron penetration to suppress short channel effect in P-channel device
    75.
    发明授权
    Boron penetration to suppress short channel effect in P-channel device 失效
    硼渗透抑制P沟道器件中的短沟道效应

    公开(公告)号：US5661059A

    公开(公告)日：1997-08-26

    申请号：US423109

    申请日：1995-04-18

    Applicant: David Liu ,  Hao Fang

    Inventor： David Liu ,  Hao Fang

    IPC: H01L21/225 ,  H01L21/28 ,  H01L21/336 ,  H01L21/8238 ,  H01L29/10 ,  H01L29/49 ,  H01L21/265

    CPC classification number: H01L29/6659 ,  H01L21/2256 ,  H01L21/28061 ,  H01L21/823807 ,  H01L29/1045 ,  H01L29/4933

    Abstract: A method for forming a set of p-channel devices with enhanced n-doping and penetration of boron into the channel region between the source and drain regions, thereby creating channel length independent p-channel threshold voltage behavior. Long channel and short channel transistors have approximately equal threshold voltages as (a) short channel effect is reduced with increased n-doping in short channel transistors (where boron penetration has little effect), and (b) the effects of boron penetration and increased n-doping are offset in longer channel transistors.

    Abstract translation: 一种用于形成具有增强的n掺杂和硼渗透到源极和漏极区域之间的沟道区域中的p沟道器件的集合的方法，从而产生与沟道长度无关的p沟道阈值电压特性。 长通道和短沟道晶体管具有近似相等的阈值电压，如（a）短沟道效应随着短沟道晶体管（其中硼渗透几乎没有影响）的n掺杂增加而减小，（b）硼渗透和增加的n 掺杂在较长的沟道晶体管中偏移。

    Method of making a non-volatile memory cell
    77.
    发明授权
    Method of making a non-volatile memory cell 失效
    制造非易失性存储单元的方法

    公开(公告)号：US5264384A

    公开(公告)日：1993-11-23

    申请号：US753252

    申请日：1991-08-30

    Applicant: Cetin Kaya ,  David Liu

    Inventor： Cetin Kaya ,  David Liu

    IPC: H01L21/8247 ,  H01L27/115 ,  H01L29/788 ,  H01L29/792 ,  H01L21/70

    CPC classification number: H01L27/11517 ,  H01L27/115 ,  H01L29/7886

    Abstract: In one embodiment, a non-volatile memory cell structure 10 comprises heavily doped source 11 and drain 12 regions formed in the surface of a semiconductor substrate 8 and separated by a channel region 21. A floating gate 13 is formed over and insulated from the channel region 21 and a control gate 14 is formed over and insulated from the floating gate 13. A lightly doped region 20 is formed in the channel 21 beneath the floating gate 13 and adjoining the source region 11. The lightly doped region 20 is spaced from the surface of said substrate 8. Other embodiments and processes are also disclosed.

    Clipboard structure
    78.
    发明授权
    Clipboard structure 失效
    剪贴板结构

    公开(公告)号：US4961249A

    公开(公告)日：1990-10-09

    申请号：US466932

    申请日：1990-01-18

    Applicant: David Liu ,  Jane Keo

    Inventor： David Liu ,  Jane Keo

    IPC: B42F9/00

    CPC classification number: B42F9/001 ,  Y10T24/202 ,  Y10T24/204 ,  Y10T24/44385

    Abstract: A clipboard structure includes a board having a seat formed on one end of an upper surface. A recess is formed in an outer end of the seat. A clamping element has two legs disposed in the recess. A spring element has two free ends fixed to the legs of the clamping element. The spring element can be easily assembled in the recess of the seat. The spring element biases the legs of the clamping element so that a front end of the clamping element is forced to abut against the board.

    Abstract translation: 剪贴板结构包括具有形成在上表面的一端上的座的板。 在座椅的外端形成凹部。 夹紧元件具有设置在凹部中的两个腿。 弹簧元件具有固定在夹紧元件的腿部上的两个自由端。 弹簧元件可以容易地组装在座椅的凹部中。 弹簧元件偏压夹紧元件的腿，使得夹紧元件的前端被迫抵靠板。

    Electrical devices
    79.
    发明授权
    Electrical devices 失效
    电气设备

    公开(公告)号：US4801785A

    公开(公告)日：1989-01-31

    申请号：US818844

    申请日：1986-01-14

    Applicant: Chi-Ming Chan ,  Pradeep Barma ,  David Chazan ,  David Liu

    Inventor： Chi-Ming Chan ,  Pradeep Barma ,  David Chazan ,  David Liu

    IPC: H05B3/14 ,  H05B3/08

    CPC classification number: H05B3/146

    Abstract: Improvements to electrical devices comprising conductive polymer compositions are described. The device, preferably a heater, comprises two electrodes, preferably planar electrodes and a conductive polymer composition, which preferably exhibits PTC behavior, and which is preferably sandwiched between the electrodes. At least one of the electrodes comprises a metal with a thin layer of high resistivity material attached thereto, e.g. anodized aluminum, so that the layer separates the electrode and the conductive polymer composition. This raises the room temperature resistance of the device and thus reduces the in-rush current.

    Abstract translation: 描述了包括导电聚合物组合物的电气装置的改进。 优选地，该装置包括两个电极，优选平面电极和导电聚合物组合物，其优选地表现出PTC行为，并且其优选地夹在电极之间。 电极中的至少一个包括具有附着到其上的具有高电阻率材料的薄层的金属。 阳极氧化铝，使得该层分离电极和导电聚合物组合物。 这提高了器件的室温电阻，从而降低了浪涌电流。

    Magnetic composition and magnetic component including the same
    80.
    发明申请
    Magnetic composition and magnetic component including the same 有权

    公开(公告)号：US20210249176A1

    公开(公告)日：2021-08-12

    申请号：US16783173

    申请日：2020-02-06

    Applicant: David Liu

    Inventor： David Liu

    IPC: H01F27/255 ,  H01F27/29 ,  H01F1/12 ,  H01F27/36 ,  H01F41/02

    Abstract: A composite magnetic material composition includes: soft magnetic material powders; permanent magnet material powders; and a binder. The material made from this composition magnetic material composition has a relative magnetic permeability of said from 2 to 100. A magnetic core fabricated using this composite magnetic material composition is magnetized, after its fabrication, and a permanent magnetic field is retained in it, regardless of the operation status of the magnetic core. The magnetic flux density of the permanent magnetic field in this magnetic core is in the range of 10 to 2000 gauss. Magnetic components comprising this magnetic core have a higher saturation current.

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