Famous Patents
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 |
| 6560882 | Hand drawing machine A hand drawing machine which includes two spring-loaded spools. Each spool includes a length of flexible material, and each length of material is attached to a rigid stick or rod. The stick, which may be adjustable, includes a pair of stylus holders. The ... | 05/13/2003 |
| 6441822 | Drawing with circular arcs A method of generation of smoothly shaped, non-circular, curves by formation of multiple circular arcs. In the method, one draws a first circular arc which passes through two points and is tangent to a first line extending from a first point in the indica... | 08/27/2002 |
| 5165175 | Reverse image drawing apparatus A mirror image apparatus for use with a pantograph for drawing, engraving, milling, and similar applications wherein tracing and creating a mirror or reverse image is required. The apparatus is characterized by broadly having a stylus which operates betwe... | 11/24/1992 |
| 4733473 | Duplicating drawing apparatus A duplicating drawing apparatus includes a frame and a support assembly mounted on the frame for linear movement in an X direction. A pair of rotary members are rotatably mounted on the support assembly. Each rotary member rotates about a Z axis extending... | 03/29/1988 |
