loadpatents
Patent applications and USPTO patent grants for Frei; Ernst.The latest application filed is for "method of, and apparatus for, area and air space surveillance".
Patent | Date |
---|---|
Method of, and apparatus for, area and air space surveillance Grant 4,780,719 - Frei , et al. October 25, 1 | 1988-10-25 |
Clothes hanger Grant 4,160,515 - Frei July 10, 1 | 1979-07-10 |
Shell For Apparatuses Working In Sound-absorbing, Heat Insulating Or Airtight Conditions Grant 3,854,261 - Frei December 17, 1 | 1974-12-17 |
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