William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 4412539 | Repeating hemostatic clip applying instruments and multi-clip cartridges therefor The instrument is generally shaped and operated in the manner of prior clip applying instruments. Shaped like a pair of dog-nosed pliers, the outer ends of the jaws are adapted to hold a clip which may be applied to a blood vessel with the instrument. The... | 11/01/1983 |
| 4202353 | Temperature and respiration sensing probe A temperature and respiration sensing probe which eliminates any problems associated with orientation in relation to either a hygenic cover or insertion into the patient's mouth. A means for sensing air movements caused by exhaled respiration is located a... | 05/13/1980 |
| 4198971 | Drip chamber with air vent An intravenous set with a volume limiting chamber for precisely controlling the volume of parenteral solution administered to a patient and a drip chamber for determining the parenteral solution flow rate. The volume limiting chamber has a membrane valve ... | 04/22/1980 |
| 4152920 | System for applying surgical clips Novel system for applying surgical clips consisting of an instrument and disposable cartridge that together create a forceps with the cartridge being quickly detachable from the instrument to permit easy and fast replacement during a surgical procedure. T... | 05/08/1979 |
| 4127227 | Wide fascia staple cartridge A cartridge is provided for applying staples to the disunited fascia of a patient. The cartridge is adapted to associate with a surgical stapling instrument which supplies rectilinear thrust to power the cartridge. The cartridge houses a plurality of stap... | 11/28/1978 |
| 4125111 | Heartbeat data acquisition conversion and display system Heartbeat data is measured and converted into a series of electrical output pulses, the frequency of which is related to the heartbeat pulse rate. The output pulses trigger "on" and "off" a timing device, and the average time of a heartbeat cycle is then ... | 11/14/1978 |
| 4123701 | Disposable sample card having a well with electrodes for testing a liquid sample Disclosed are several embodiments of a disposable sample card for testing fluids such as blood and the like. A generally planar card contains a chamber, or well and supports two insulated electrodes which terminate in the region of the well. Various elect... | 10/31/1978 |
| 4116228 | Respiration data acquisition, conversion and display system Respiration data is measured and converted into a series of electrical output pulses, the frequency of which is related to the respiration rate. The output pulses trigger "on" and "off" a timing device, and the average time of a respiration cycle is then ... | 09/26/1978 |