Glam girl Heddy Lamar may have used her good looks to good effect on the silver screen, but she put her smarts to better use as an inventor. During World War II, she co-patented a frequency-switching system for torpedo guidance that was considered years ahead of its time.
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| Number | Title | Issue Date |
| 5388864 | Air brake hose coupling member A coupling member for detachably connecting together two sections of air brake hose between railroad cars. Each coupling member has a hollow tubular body with one end attached to a section of hose and with an opposite end having an arcuate body portion ex... | 02/14/1995 |
| 5333915 | Coupling A coupling half designed to mate with an identical coupling half to form a coupling for interconnecting sections of hose or the like, has a tubular body having at one end a projecting tooth and a complementary socket arrangement constituted by a plurality... | 08/02/1994 |