| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 133 | |
| #2 | Canada | 3 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Measurement | |
| #3 | Machines | |
| #4 | Basic communication technologies | |
| #5 | Computer technology | |
| #6 | Control |
| # | Name | Total Patents |
|---|---|---|
| #1 | Washburn Harold W | 27 |
| #2 | Hoover Jr Herbert | 17 |
| #3 | Berry Clifford E | 17 |
| #4 | Robinson Charles F | 15 |
| #5 | Langmuir Robert V | 8 |
| #6 | Goodwin Paul S | 7 |
| #7 | Olesen Raymond C | 5 |
| #8 | Metcalf Herbert E | 5 |
| #9 | Lawlor Reed C | 5 |
| #10 | Sink Robert L | 4 |
| Publication | Filing date | Title |
|---|---|---|
| US2845539A | Mass spectrometry | |
| US2694151A | Mass spectrometry | |
| US2696562A | Transmission | |
| US2672560A | Ion source | |
| US2718595A | Mass spectrometry | |
| US2648009A | Mass spectrometer | |
| US2676270A | Radiological measurement apparatus | |
| US2680812A | Mass spectrometry | |
| US2676264A | Automatic control apparatus for mass spectrometers | |
| US2688088A | Mass spectrometer | |
| US2629056A | Voltage sensitive circuit | |
| US2671177A | Electrostatic charging apparatus | |
| US2662185A | Mass spectrometry | |
| US2662184A | Mass spectrometry | |
| US2587575A | Mass spectrometry | |
| US2645750A | Slidewire power supply | |
| US2672559A | Mass spectrometry | |
| US2706401A | Low frequency vibrometer | |
| US2593407A | Variable resolution collector system | |
| US2680383A | Rotatable control |