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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 6053349 | Beverage can identification apparatus and method for reducing the spread of disease by limiting the chance of inadvertent drinking from an open can of another A technique for avoiding the risk of spreading communicable diseases in drinking inadvertently from another's open beverage can by applying distinctive user identification markers on the can top cover, positioned arcuately about the cover and identified b... | 04/25/2000 |
| 5778818 | Indicator Indicators and methods of indicating are disclosed. Intended primarily for use with medicine containers, the devices typically indicate the number of doses of medication ingested or remaining to be taken by a patient during a particular period. These devi... | 07/14/1998 |
| 5492077 | Indicating pop top beverage container An easy open beverage container has a lever tab for breaking open a scored panel portion of the end wall by lifting up the distal lift end. The tab is held rotatably to the end wall by a rivet, which acts as a fulcrum forcing the proximal end of the tab d... | 02/20/1996 |
| 5113590 | Protractor A protractor comprising a generally flat protractor disc having a straight edge portion and a semi-circular portion. An arm member is pivotally secured at one end to a central section of the straight edge portion and overlies the front surface of the semi... | 05/19/1992 |
| 4477149 | Resettable mirror assembly A vehicle body side mirror assembly includes indicia arranged to facilitate resetting of the vehicle mirror to a previously determined position. The mirror assembly includes indicia such that the mirror assembly may be mounted on either the passenger or d... | 10/16/1984 |
| 4140077 | Portable navigational aid A portable navigational aid or device for use in a user-sailboat or similar vessel, where the user-sailboat and another approaching boat are traveling along courses which intersect, to indicate readily whether the user-sailboat should have the right-of-wa... | 02/20/1979 |
| 4096633 | Anti-collision plotter An anti-collision plotter for use by the pilot and/or crew of an inflight aircraft for rapidly and automatically providing a visual representation of those sectors surrounding the aircraft in which the probability of colliding with another aircraft is rel... | 06/27/1978 |
| 4037490 | Two-step control knob operation A push-to-turn knob design for a rotary switch to prevent accidental actuation of the switch by requiring a two-step operation sequence. This operating function is obtained without modifying the design of the rotary switch. Hence, a standard rotary switch... | 07/26/1977 |
| 4013036 | Time switch device for X-ray diagnostic apparatus A time switch device for X-ray diagnostic apparatus, in particular for the preparation of tooth or dental exposures, including a knob for the setting of the exposure periods and which has a time scale on a scale carrier associated therewith. The knob has ... | 03/22/1977 |
| 3958529 | Work-time indicator A circular clock face bearing time indicia equally spaced in a concentric relationship thereon providing a base to support and correlate time quantity indicators. A plurality of arcuate segmented indicators marginally disposed along the perimeter of the f... | 05/25/1976 |
