| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 15 | |
| #2 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Machines | |
| #3 | Optics | |
| #4 | Machine tools | |
| #5 | Mechanical elements | |
| #6 | Consumer goods | |
| #7 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Measuring distances | |
| #2 | Unspecified technologies | |
| #3 | Processing photographic materials | |
| #4 | Cutting | |
| #5 | Pipes | |
| #6 | Postal sorting | |
| #7 | Unspecified technologies | |
| #8 | Harvesting | |
| #9 | Measuring length, angles and areas | |
| #10 | Goods for writing upon |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lew Suverkrop | 14 |
| #2 | Joseph Wallace Donald | 1 |
| #3 | Suverkrop Lew | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3435950A | Materials separation devices | |
| US3233490A | Paper trimmers | |
| US3233493A | Paper trimmers | |
| US2985964A | Plumb bobs | |
| US3056211A | Adjustable plumb bobs | |
| US2965973A | Reel for plumb bob | |
| US2754794A | Geared angle indicator | |
| US2594823A | Plumb bob | |
| GB649088A | Improvements in or relating to surveying instruments | |
| GB614735A | Improvements in or relating to plumb bobs | |
| US2633639A | Surveying instrument | |
| US2469583A | Adjustable plumb bob | |
| US2324041A | Geometrical instrument | |
| US2231036A | Surveying instrument | |
| US1875830A | Surveying instrument | |
| US1875829A | Surveying instrument | |
| US1744842A | Flow nipple |