Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 5237934 | End cap gate sampling device The present invention is a control device that allows an operator to partially open a gate valve found at the bottom of a railway freight car hopper in order to obtain a sample of a flowable particulate or granular product contained within the hopper but ... | 08/24/1993 |
| 4077329 | Opening and closing means for hinged trough covers on hopper cars An elongated hatch opening in the roof of a hopper car includes a pair of hatch covers hinged on opposite sides of the hatch. A motor and operating mechanism supported at the end of the hatch reciprocates a pair of push-pull bars positioned within the hat... | 03/07/1978 |
