Keystone Tower Systems, Inc.
31Patents
30Active
31Granted
53Portfolio score
Filing activity: Jan 25, 2010 → Feb 6, 2023
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8720153B2 | Tapered spiral welded structure | Emerging Cross-Sectional Technologies | 7 | Active |
| US9475153B2 | Tapered spiral welded structure | Emerging Cross-Sectional Technologies | 6 | Active |
| US11185952B2 | Flange fitting for tubular structures | Performing Operations; Transporting | 4 | Active |
| US10201841B2 | Sheet transitioning in spiral formed structures | Emerging Cross-Sectional Technologies | 3 | Active |
| US10189064B2 | Control system and method for tapered structure construction | Emerging Cross-Sectional Technologies | 3 | Active |
| US10486212B2 | Sheet transitioning in spiral formed structures | Emerging Cross-Sectional Technologies | 3 | Active |
| US10807136B2 | Sheet transitioning in spiral formed structures | Emerging Cross-Sectional Technologies | 2 | Active |
| US11364527B2 | Control system and method for tapered structure construction | Emerging Cross-Sectional Technologies | 1 | Active |
| US10974298B2 | Tapered structure construction | Performing Operations; Transporting | 1 | Active |
| US11834856B2 | Tapered spiral welded structure | Emerging Cross-Sectional Technologies | 1 | Active |
| US10195653B2 | Tapered structure construction | Performing Operations; Transporting | 1 | Active |
| US10895088B2 | Tapered spiral welded structure | Emerging Cross-Sectional Technologies | 1 | Active |
| US11213872B2 | Spiral forming | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US10060149B2 | Tapered spiral welded structure | Emerging Cross-Sectional Technologies | 1 | Active |
| US11571727B2 | Tapered structure construction | Performing Operations; Transporting | 1 | Active |
| US10493509B2 | Spiral forming | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US10717122B2 | Cylindrical tube formation | Emerging Cross-Sectional Technologies | 1 | Active |
| US9302303B2 | Tapered structure construction | Performing Operations; Transporting | 1 | Active |
| US10626672B2 | Wind turbine tower attachment | Emerging Cross-Sectional Technologies | 0 | Active |
| US12257616B2 | Control system and method for tapered structure construction | Emerging Cross-Sectional Technologies | 0 | Active |
| US11686155B2 | Wind turbine tower attachment | Emerging Cross-Sectional Technologies | 0 | Active |
| US12240025B2 | Sheet transitioning in spiral formed structures | Emerging Cross-Sectional Technologies | 0 | Active |
| US11529661B2 | Sheet transitioning in spiral formed structures | Emerging Cross-Sectional Technologies | 0 | Active |
| US12297951B2 | Tubular structure reinforcing | Emerging Cross-Sectional Technologies | 0 | Active |
| US9266157B2 | Tapered structure construction | General | 0 | Revoked |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.