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In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 7356361 | Hand-held device A hand-held device that provides communication services and symbol processing is described. The device includes a case having a front side comprising a display and a lid having a transparent portion through which the display can be seen in a lid-closed state. In one... | 04/08/2008 |
| D563756 | Combination calculator letter opener | 03/11/2008 |
| 7275253 | Electronic apparatus and apparatus for recording and/or playback on recording medium An apparatus is provided comprising: a record and/or playback units having a first circuit board provided with a grounding potential unit; a cover body pivotably mounted to the record and/or playback unit and including a shield member connected to the grounding pote... | 09/25/2007 |
| D535335 | Notepad holder with concealable calculator | 01/16/2007 |
| D520178 | Calculator lighter | 05/02/2006 |
| D502726 | Photo frame with calculator | 03/08/2005 |
| D502496 | Electronic checkbook with printer | 03/01/2005 |
| D502497 | Carabiner with calculator | 03/01/2005 |
| D490100 | Calendar calculator | 05/18/2004 |
| 5230159 | Tape rule calculator A calculator is adapted to be releasably attached to a conventional tape rule. A calculator case is attached to the rule with a flat rubber band that sits in a recessed channel in the case and passes around the tape rule. Alternatively the case may be att... | 07/27/1993 |
| 5180133 | Clipboard having a calculator mounted thereon A clipboard includes a board and a clip member. A recess is formed at the outside face of the clamp member and is configured to receive a calculator. A positioning device is provided for detachably positioning the calculator in the recess of the clamp mem... | 01/19/1993 |
| 5093760 | Calculator having a thin resilient clip disposed about the outer periphery A clip-on calculator assembly comprising a thin calculator housing containing a calculator and a thin resilient clip disposed about the outer periphery of the calculator housing. The clip is integrally connected to a portion of the calculator housing. Spa... | 03/03/1992 |
| 4988025 | Shopping cart attachment A shopping cart attachment includes an advertisement and a calculator including a display. The calculator displays a message related to the advertisment on the display, in response to a predetermined occurrence such as depression of the CLEAR key. Because... | 01/29/1991 |
| 4425014 | Housing for data entry equipment The housing is intended for use with data entry equipment having first manual control elements for routine operation and second manual control elements not required for routine operation and comprises a baseplate and a cover device covering the baseplate ... | 01/10/1984 |
| 4041291 | Dollars and cents telephone metering computer A battery powered hand held or telephone snap-on computer programmed digital calculator instrument, for simultaneously timing, computing and calculating cost plus tax of a running long distance telephone toll call (LDTTC) in dollars & cents ($ & .cent.) a... | 08/09/1977 |
