子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | Calculating apparatus | US770552D | US770552A | 1904-09-20 | ||
| 142 | Calculator. | US1903171167 | 1903-08-29 | US767087A | 1904-08-09 | SPECKMAN CHARLES H |
| 143 | Adding-machine. | US1894532855 | 1894-12-24 | US754544A | 1904-03-15 | CLARK WILLIAM H |
| 144 | Device for proving addition | US626524D | US626524A | 1899-06-06 | ||
| 145 | Adding-machine | US614383D | US614383A | 1898-11-15 | ||
| 146 | Tax-bill com putator | US614274D | US614274A | 1898-11-15 | ||
| 147 | Yardstick-calculator | US566867D | US566867A | 1896-09-01 | ||
| 148 | Calculating-machine for weights and values | US551520D | US551520A | 1895-12-17 | ||
| 149 | Adding-machine | US529799D | US529799A | 1894-11-27 | ||
| 150 | Adding machine | US465120D | US465120A | 1891-12-15 | ||
| 151 | jewett | US446753D | US446753A | 1891-02-17 | ||
| 152 | Calculator | US421108D | US421108A | 1890-02-11 | ||
| 153 | Calculator | US356140D | US356140A | 1887-01-18 | ||
| 154 | Calculator | US344624D | US344624A | 1886-06-29 | ||
| 155 | John thomson | US274674D | US274674A | 1883-03-27 | ||
| 156 | Improvement in adding-mach ines | US209644D | US209644A | 1878-11-05 | ||
| 157 | SECONDARY SINGLE SCREEN MODE ACTIVATION THROUGH USER INTERFACE TOGGLE | US16025083 | 2018-07-02 | US20180307456A1 | 2018-10-25 | Sanjiv Sirpal; Mohammed Selim |
| Methods and devices for selectively presenting a user interface on a second screen. More particularly, the method includes a change in the display mode of a multiple screen device from a first screen to a second screen while the device is closed. The change in the display mode may be made in response to a request from an application. The application may be executed and have the user interface window associated with the application moved to a second screen. The change to the second screen can be requested based on input into the application or automatically generated based on the type of application. In response to the request from the application, the device can render the user interface in the second screen. | ||||||
| 158 | Secondary single screen mode activation through user interface toggle | US14821338 | 2015-08-07 | US10013226B2 | 2018-07-03 | Sanjiv Sirpal; Mohammed Selim |
| Methods and devices for selectively presenting a user interface on a second screen. More particularly, the method includes a change in the display mode of a multiple screen device from a first screen to a second screen while the device is closed. The change in the display mode may be made in response to a request from an application. The application may be executed and have the user interface window associated with the application moved to a second screen. The change to the second screen can be requested based on input into the application or automatically generated based on the type of application. In response to the request from the application, the device can render the user interface in the second screen. | ||||||
| 159 | SENSING THE SCREEN POSITIONS IN A DUAL SCREEN PHONE | US15905603 | 2018-02-26 | US20180181361A1 | 2018-06-28 | Charles Becze |
| A handheld communication device includes first and second screens, a hinge to rotate the first and second screens between open and closed positions, and a position sensor to determine the relative position of the first and second screens. The position sensor can be a Hall-Effect sensor. | ||||||
| 160 | Beveled handheld communication device edge | US14874159 | 2015-10-02 | US09946505B2 | 2018-04-17 | Charles Becze; Michael J. O'Connor |
| A handheld computing device can include a substantially rectangular first screen having a front surface, a rear surface, and a beveled edge extending between the front and rear surfaces of the first screen and a substantially rectangular second screen rotatably connected to the first screen so that the device is foldable between an open position and a closed position, the second screen having a front surface, a rear surface, and a beveled edge extending between the front and rear surfaces of the second screen. When the device is in the closed position, the first and second screens are positioned back-to-back and the beveled edges of the first and second screens angle inwardly toward the other respective screen to provide an angled surface configured to facilitate opening the device. | ||||||
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