| CA Patent: CA-2,923 
 | 
| Pipe Tongs | 
| 
| Patentee: |  |
 | James R. Brown (exact or similar names) - Cambridge, MA |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
 | 
| Patent Dates: |  
| Granted: | Dec. 19, 1873 |  
 
CIPO Data| Patent Pictures: |  |  |  | Hazen P. Huntoon (assignee of James R. Brown) edited from CANADIAN PATENT OFFICE RECORD |  Espacenet patent
 Report data errors or omissions to steward 
                        Stan Schulz
 Canadian patent no. 2,923 in FLICKR
 2,923 in Canadian Patents Database
 
 | 
| 
| Description: |  | The summary in the Canadian Patent Office Record describes a version of Brown's pipe tongs in which the adjusting thumb screw retains a fixed position in relation the the handle. 
Corresponding U.S. patent no. 144,253 was issued to James R. Brown on November 4, 1873. The full patent (like corresponding British patent GB-187303762) folds in other alternatives which received separate U.S. patents (i.e. 142,143 and 145,929). |  |