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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 |
| 4413505 | Electrochemical flow cell, particularly use with liquid chromatography An amperometric cell modified for high pressure operation is described. The cell is a flow-through type cell defining a flow path and has at least one active testing electrode, at least one reference electrode and at least one counter electrode operativel... | 11/08/1983 |
| 4374041 | Testing reagent A reagent composition particularly adapted for use in treating organic samples suspected of containing chemically-bound heavy metals preparatory to electrically detecting and measuring the heavy metal content of the samples. The composition includes an el... | 02/15/1983 |
| 4288303 | Electrochemical processing system An electrochemical processing system is provided. The system comprises an electrochemical cell having a first compartment adapted to contain a first solution, a first counter electrode and a first reference electrode in contact with the first solution, a ... | 09/08/1981 |
| 4253847 | Preparing sample for electrochemical testing system An electrochemical measuring system which effects, measures and sorts charge transfer reactions of selected substances in a sample solution is provided. The system includes a novel electrode which is adapted to measure simultaneously on at least two elect... | 03/03/1981 |
| 4233031 | Electrochemical testing system and method An electrochemical measuring system which effects, measures and sorts charge transfer reactions of selected substances in a sample solution is provided. The system includes a novel electrode which is adapted to measure simultaneously on at least two elect... | 11/11/1980 |
| 4226695 | Electrochemical processing system An electrochemical processing system is provided. The system comprises an electrochemical cell having a first compartment adapted to contain a first solution, a first counter electrode and a first reference electrode in contact with the first solution, a ... | 10/07/1980 |
| 4201646 | Apparatus for stripping voltammetry A system is disclosed for voltammetry such as anodic stripping voltammetry including a special electrode mounted to be fitted into a sample holder, stirring means operable through the electrode and an electrolytic potential source, optionally pulsed, capa... | 05/06/1980 |
