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The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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| Number | Title | Issue Date |
| 7049147 | Method for process line testing An apparatus capable of characterizing the fluid content of chemicals in a reaction line comprises a rheometer. The apparatus can be connected to or included in a reaction flow stream, and has a retractable wall 26 that opens to provide an opening 28 t... | 05/23/2006 |
| 6782736 | Methods and devices for measuring interface levels between fluids, and uses thereof A method for measuring interface levels between fluids is described, characterized in that, with the aid of a magnetic field forming means, a variable magnetic field is formed in one of the fluids whereby a counterflowing magnetic field is established, being a funct... | 08/31/2004 |
| 6460403 | Device for analysing preferably animal manure A device which may be carried by and part of an unmanned vehicle which measures characteristics of manure of animals such as dairy cows that are milked and fed in a stable provided for them. The vehicle is supported by three driven wheels and carries a me... | 10/08/2002 |
| 5537859 | Method of determining the amount of the fluid content with a smaller specific gravity in airtightly sealed flexible containers on a continuous basis A method determines the amount of the fluid content with a smaller specific gravity in an airtightly sealed flexible container containing contents with different specific gravities that are automatically separated from each other when held to a stationary... | 07/23/1996 |
| 5503002 | Sensitive rotating viscometer instrument A sensitive rotating viscometer instrument generally having a housing surrounding a bath tub, the housing having a top upon which can be provided at least one sensitive rotating viscometer with a stator insertable through the top of the housing and into t... | 04/02/1996 |
| 4942759 | Viscosity testing apparatus A viscosity test apparatus is disclosed including a reference chamber that is partially filled by a predetermined volume of reference liquid having a known viscosity. There is a test chamber attached to the reference chamber which is partially filled with... | 07/24/1990 |
| 4794787 | High-low viscosity comparator A method and apparatus is provided for determining decreases and increases of viscosities of used oils or fluids and to detect changes in the oils or fluids during operation in equipment or storage. The limits on both ends can be established by the indivi... | 01/03/1989 |
| 4316383 | Apparatus for measuring the representative parameters of rheological properties of viscoelastic fluids Apparatus for determining rheological parameters of viscoelastic fluids is provided. The apparatus comprises two similar cylinder-piston assemblies ending at identical flow orifices. The pistons are pushed conjointly by a motor at an adjusted speed. A dif... | 02/23/1982 |
| 4221073 | Fluid flow and viscosity display toy An amusement device for young children having a six-sided open frame with four sides thereof providing handles to orient three closed and separate chambers located between the other two sides, each chamber containing a fluid or material of different visco... | 09/09/1980 |
