| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 20 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Machines | |
| #3 | Optics | |
| #4 | Textiles and paper | |
| #5 | Chemical engineering | |
| #6 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Measuring volume | |
| #2 | Unspecified technologies | |
| #3 | Special measuring | |
| #4 | Photomechanical semiconductor production | |
| #5 | Analysing materials | |
| #6 | Reproduction of printing surfaces | |
| #7 | Sewers | |
| #8 | Printing machines | |
| #9 | Separation |
| # | Name | Total Patents |
|---|---|---|
| #1 | Alger Harley C | 20 |
| Publication | Filing date | Title |
|---|---|---|
| US2399534A | Etching device for rotogravure cylinders | |
| US2456608A | Type for gravure printing | |
| US2373087A | Intaglio printing | |
| US2387048A | Photoengraving or the like | |
| US1430274A | Lost-motion take-up for printing presses or the like | |
| US1393931A | Liquid-meter | |
| US1132994A | Liquid-meter. | |
| US1122229A | Smoke-recorder. | |
| US1131892A | Recorder. | |
| US1127387A | Liquid-siphon. | |
| US1120583A | Dividing-box. | |
| US1130954A | Recorder. | |
| US1087097A | Liquid-meter. | |
| US1081083A | Liquid-meter. | |
| US1086433A | Combination heater and meter. | |
| US1089101A | Fluid-meter. | |
| US1093903A | Smoke-recording apparatus. | |
| US1096883A | Fluid-flow meter. | |
| US990028A | Feed-water heater. | |
| US1126933A | Liquid-meter. |