John L Frehn
Inventor
Stats
- 1 US patents issued
- 1 US Applications filed
- most recent filing
This is official USPTO record data
Details
- 1 US Patents Issued
- 1 US Applications Filed
- 32 Total Citation Count
- Oct 27, 1983 Most Recent Filing
- Oct 27, 1983 Earliest Filing
Work History
No Work History Available.Inventor Addresses
| Address | Duration |
|---|---|
| 44742 Elm Ave., Lancaster, CA 93534 | Oct 08, 85 - Oct 08, 85 |
Technology Profile
| Technology | Matters | |
|---|---|---|
| H04R: | LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS | 1 |
Patents / Publication
| Patents / Publication # | Year of Publication / Issued | Title | Citations |
|---|---|---|---|
| 4546217 | 1985 | Telephone sanitary cover | 26 |
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