| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 6 | |
| #2 | United Kingdom | 5 | |
| #3 | Sweden | 3 | |
| #4 | Netherlands | 2 | |
| #5 | United States | 2 | |
| #6 | Belgium | 1 | |
| #7 | EPO (European Patent Office) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Electrical machinery and energy | |
| #3 | Semiconductors | |
| #4 | Audio-visual technology | |
| #5 | Foods and drinks | |
| #6 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Semiconductor devices | |
| #2 | Casings and printed circuits | |
| #3 | Resistors | |
| #4 | Unspecified technologies | |
| #5 | Capacitors and switching devices | |
| #6 | Unspecified technologies | |
| #7 | Shaping of plastics | |
| #8 | Foods | |
| #9 | Measuring electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Spierings Ferdinand Hubert Fra | 9 |
| #2 | Dr Ferdinand Hubert Franciscus | 1 |
| #3 | Spierings F H F G | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL8701758A | Method for applying a track opening in a coating of electrically conductive material on a plastic carrier. | |
| NL7700081A | METHOD FOR APPLYING A LINE-shaped OPENING IN A COATING OF ELECTRICALLY CONDUCTIVE MATERIAL ON A SUBSTRATE. | |
| US3967144A | Hall-voltage device | |
| DE2521708A1 | HALL VOLTAGE DEVICE | |
| US3970922A | Hall-voltage device | |
| GB1445776A | Box structure for a hall voltage device | |
| GB1460644A | Mercury contact system for a hall voltage device | |
| GB1389413A | Hall-voltage device | |
| GB877533A | A method of making a citrus fruit consumable from the hand |