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Mentor Corporation was founded in Minneapolis, Minnesota in 1969 by Christopher Conway, Eugene Glover, and Thomas Hauser. [5] [6] Mentor went public in 1970 and its first product line consisted of electronic laboratory instruments for the detection and measurement of the electrical activity of nerve cells and neural systems. Special urethral ...
Parts books were often issued as microfiche, though this has fallen out of favour. Now, many manufacturers offer this information digitally in an electronic parts catalogue. This can be locally installed software, or a centrally hosted web application. Usually, an electronic parts catalogue enables the user to virtually disassemble the product ...
Tissue expansion is a common technique used for breast reconstruction. [20] This essentially involves expansion of the breast skin and muscle using a temporary tissue expander. [21] Three to four weeks after the mastectomy, a saline solution will be injected into the expander to gradually fill it. This process is supported by a tiny valve ...
Tissue supported expanders allow the forces to be applied directly to the tissues of palatal mucosa instead of teeth. The most common type of tissue-borne expander is known as the Haas Appliance. This appliance was popularized by Andrew Haas in 1961. This appliance involves bands placed on maxillary first premolar and first molars on each side.
An adjunct to the utilization of local and locoregional flaps is the option of tissue expanders. They effectively increase the net skin surface area and provide skin that has the same texture, colour, and hair bearing qualities as the recipient site. [3]
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These parts are prefixed with 54 instead of 74 in the part number. [1] A short-lived 64 prefix on Texas Instruments parts indicated an industrial temperature range; this prefix had been dropped from the TI literature by 1973. Most recent 7400-series parts are fabricated in CMOS or BiCMOS technology rather than TTL.
Edmund Scientific Corporation, based in Barrington, New Jersey, was founded in 1942 as a retailer of surplus optical parts like lenses.It later branched out into complete systems like telescopes and microscopes, and in the 1960s, a wide variety of science toys and kits.