HE

Herman J. Engel

📍 Philadelphia, PA: #452 of 4,834 inventorsTop 10%
🗺 Pennsylvania: #10,339 of 74,527 inventorsTop 15%
Overall (All Time): #671,601 of 4,157,543Top 20%
8
Patents All Time

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
D291556 Adapter base for fluorescent lamp 1987-08-25
D291557 Adapter base for fluorescent lamp 1987-08-25
4623823 Electrical adapter for use in connection with fluorescent lamps 1986-11-18
D285007 Combined fluorescent lamp and electrical adapter therefor 1986-08-05
D284757 Adapter base for electric lamp 1986-07-22
D284793 Combined fluorescent lamp and electrical adapter therefor 1986-07-22
D284652 Adapter base for electric lamp 1986-07-15
4570105 Electrical adapter for use in connection with fluorescent lamps 1986-02-11