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1. 发明申请

US20060139644A1 Colorimetric device and colour determination process 失效
标题翻译：比色装置和色彩确定过程
公开(公告)号：US20060139644A1
公开(公告)日：2006-06-29
申请号：US11311310
申请日：2005-12-20
申请人： David Kahn , John Davey
发明人： David Kahn , John Davey
IPC分类号： G01J3/50
CPC分类号： G01J3/02 , G01J3/0262 , G01J3/0264 , G01J3/0272 , G01J3/0283 , G01J3/0291 , G01J3/50 , G01J3/501 , G01J3/524 , G01J2001/4242
摘要： A hand-held colorimetric device (101) suitable for use by blind or colour-blind individuals to determine the colour of a surface-under-test (SUT), for example of a fabric, has an aperture (110) which, in use, is covered by the SUT (113) whose colour is to be determined. Six LEDs (115A, 115B, 116B, 117A and 117B) arranged in pairs (115A/115B, 116A/116 B, 117a/117B) emitting red/orange, green, and blue light illuminate the SUT and diffuse reflections therefrom containing red/orange, green, and blue spectrum sample values are used to determine the luminous reflectivity and chromaticity values for the colour of the SUT. The measured values are compared with colorimetric values of reference surfaces to determine the colour of the SUT. The colorimetric device may output the name of the colour aurally.
摘要翻译：适用于盲人或失明个人用于确定例如织物的待测表面（SUT）的颜色的手持式比色装置（101）具有孔（110），其在使用中，由要确定其颜色的SUT（113）覆盖。布置成红色/橙色，绿色和蓝色光的六个LED（115A，115B，116B，117A和117B）成对配置（115A / 115B，116A / 116B，117A / 117B）照亮SUT，并且使用包含红/橙，绿和蓝光谱样本值的漫反射来确定SUT的颜色的发光反射率和色度值。将测量值与参考表面的比色值进行比较以确定SUT的颜色。比色装置可以听觉地输出颜色的名称。

2. 发明授权

US4028591A Relay contact protector 失效
标题翻译：继电器触点保护器
公开(公告)号：US4028591A
公开(公告)日：1977-06-07
申请号：US624810
申请日：1975-10-22
申请人： David Kahn , Howard Richard Peiffer
发明人： David Kahn , Howard Richard Peiffer
IPC分类号： H01C7/04 , H01H9/54 , H02H7/22 , H02H9/00 , H02H3/00
CPC分类号： H01H9/54 , H01C7/04 , H02H7/222 , H02H9/001
摘要： A polyconductor device is connected in series with a pair of current carrying contacts of a relay switch to delay the current surge through the contacts during the closure thereof. The polyconductor device has a negative temperature-resistance characteristic such that its electrical resistance value at temperatures below a predetermined transition temperature is at least several orders of magnitude larger than its resistance value at temperatures above the transition temperature. When the contacts are initially closed, only a small electric current passes through the polyconductor device which is in its high resistance state. After a predetermined time, the current heats the device to a critical temperature at which time polyconductor device switches to its low resistance state and the current flows essentially unimpeded thereby. During the heat-up time the contacts of the relay switch have completed bouncing and are in a stable, closed condition.
摘要翻译：多导体器件与继电器开关的一对载流触点串联连接，以在闭合期间延迟通过触点的电流浪涌。多导体器件具有负的耐温特性，使得在低于预定转变温度的温度下的电阻值比在高于转变温度的温度下的电阻值至少几个数量级。当触点初始闭合时，只有小的电流通过处于其高电阻状态的多导体器件。在预定时间之后，电流将器件加热到临界温度，此时多晶体器件切换到其低电阻状态，并且电流基本上不受阻碍地流动。在加热时间内，继电器开关的触点已完成弹跳并处于稳定的闭合状态。

3. 发明授权

US3632186A Closeup stereoscopic slide viewer 失效
标题翻译：关闭立体幻灯片查看器
公开(公告)号：US3632186A
公开(公告)日：1972-01-04
申请号：US3632186D
申请日：1970-09-04
申请人： DAVID KAHN
发明人： KAHN DAVID
IPC分类号： G02B27/22
CPC分类号： G02B27/2228
摘要： There is disclosed a slide viewer wherein a slide is interposed in a housing supporting a viewing lens and a translucent window. Movably supported between the viewing lens and the slide is an enlarging lens which is movable over different regions of the slide for obtaining enlarged views of portions of the slide.
摘要翻译：公开了一种滑动观察器，其中滑动件插入支撑观察透镜和半透明窗口的壳体中。可移动地支撑在观看镜头和幻灯片之间的是放大镜头，其可在滑块的不同区域上移动以获得幻灯片的部分的放大视图。

4. 外观设计

USD185932S Cap for a writing instrument or a similar article 未知
公开(公告)号：USD185932S
公开(公告)日：1959-08-18
申请日：1958-06-24
申请人： David Kahn
设计人： David Kahn

5. 外观设计

USD158465S Fountain pen or pencil clip 未知
公开(公告)号：USD158465S
公开(公告)日：1950-05-09
申请日：1948-05-13
申请人： David Kahn
设计人： David Kahn

6. 发明授权

US06313285B1 Purification of plasmid DNA 失效
标题翻译：纯化质粒DNA
公开(公告)号：US06313285B1
公开(公告)日：2001-11-06
申请号：US09620849
申请日：2000-07-21
申请人： Michelle D. Butler , Darien L. Cohen , David Kahn , Marjorie E. Winkler
发明人： Michelle D. Butler , Darien L. Cohen , David Kahn , Marjorie E. Winkler
IPC分类号： C12N1510
CPC分类号： C12N15/1017 , Y10S977/894 , Y10S977/898 , Y10S977/91 , Y10S977/912 , Y10S977/914 , Y10S977/924
摘要： A process is described for purifying plasmid DNA from prokaryotic cells comprised thereof. This process comprises the steps of: (a) digesting the cells; (b) incubating the cells for about 4 to 24 hours to effect lysis and solubilization thereof, without effecting enzymatic digestion of RNA; (c) removing lysate contaminants from the cells to provide a plasmid DNA solution; (d) filtering the solution through a tangential flow filtration device to obtain a retentate containing the plasmid DNA; and (e) collecting the retentate.
摘要翻译：描述了从其组成的原核细胞中纯化质粒DNA的方法。该方法包括以下步骤：（a）消化细胞; （b）将细胞孵育约4至24小时以进行裂解和溶解，而不影响RNA的酶促消化; （c）从细胞中除去裂解物污染物以提供质粒DNA溶液; （d）通过切向流过滤装置过滤溶液以获得含有质粒DNA的滞留物; 和（e）收集滞留物。

7. 发明授权

US4934968A Nickel plated contact surface having preferred crystallographic orientation 失效
标题翻译：镀镍的接触表面具有优选的晶体取向
公开(公告)号：US4934968A
公开(公告)日：1990-06-19
申请号：US331707
申请日：1989-03-31
申请人： Thomas F. Davis , David Kahn
发明人： Thomas F. Davis , David Kahn
IPC分类号： C25D3/12 , H01R13/03
CPC分类号： C25D3/12 , H01R13/03 , H01R12/716 , Y10S428/929 , Y10S428/935 , Y10T428/12944
摘要： Electrical contact device such as a terminal or a contact surface, has electrodeposited nickel thereon. The crystallites of the nickel are preferentially oriented with at least 50 percent of the volume {100} atomic planes substantially parallel to the contact surface. For many purposes, the preferentially oriented nickel surface is comparable to a gold plated contact surface.
摘要翻译：诸如端子或接触表面的电接触装置在其上电沉积镍。镍的微晶优先取决于体积{100}原子平面的至少50％基本上平行于接触表面。出于许多目的，优先取向的镍表面与镀金接触表面相当。

8. 发明授权

US4040808A Method for manufacture of vanadium dioxide polyconductors 失效
标题翻译：制造二氧化钒多孔体的方法
公开(公告)号：US4040808A
公开(公告)日：1977-08-09
申请号：US598913
申请日：1975-07-24
申请人： David Kahn , Raymond James Geckle
发明人： David Kahn , Raymond James Geckle
IPC分类号： H01B1/00 , H01B1/08 , H01C7/00 , C03B32/00 , C03B35/00 , H01B1/06
CPC分类号： H01C7/001 , H01B1/00 , H01B1/08
摘要： A method for the production of an article suitable as a circuit element is formed by admixing vanadium dioxide or doped vanadium dioxide with a binder of vanadium pentoxide and phosphorus pentoxide then heating and shaping the admixture into a shape.
摘要翻译：制备适合作为电路元件的制品的方法是通过将二氧化钒或掺杂的二氧化钒与五氧化二钒和五氧化二磷的粘合剂混合形成的，然后加热并将该混合物成形为一种形状。

9. 外观设计

USD141588S Kahn fountain pen 未知
公开(公告)号：USD141588S
公开(公告)日：1945-06-12
申请日：1945-02-02
申请人： David Kahn
设计人： David Kahn

10. 外观设计

USD101042S Fountain pen and pencil clip 未知
公开(公告)号：USD101042S
公开(公告)日：1936-09-01
申请日：1936-06-10
申请人： David Kahn
设计人： David Kahn

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