| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Spain | 2 | |
| #3 | Austria | 1 | |
| #4 | Switzerland | 1 | |
| #5 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Basic communication technologies | |
| #2 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Resonators | |
| #2 | Measuring light | |
| #3 | Amplifiers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Vreeland Frederick K | 8 |
| #2 | Vreeland Corporation | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2751811A | Direct reading analytical spectroscope | |
| US2259596A | Band receiving system | |
| US2259595A | Band receiving system | |
| US1850973A | Band receiving system | |
| US1903394A | Radiofrequency amplifier | |
| ES108725A1 | Improvements in the receiver systems of frequency bands. | |
| GB294939A | Improvements in band receiving systems for wireless telephony and the like | |
| ES105820A1 | Perfections in frequency amplifiers of alternating currents. | |
| US1725433A | Band-receiving system | |
| US1730987A | Variable band amplifier | |
| US1682874A | Radio frequency amplifier |