Number | Name | Date | Kind |
---|---|---|---|
683887 | Bedell | Oct 1901 | |
2922184 | Bogater | Jan 1960 | |
3906587 | Little | Sep 1975 | |
4571775 | Leonard | Feb 1986 | |
4876956 | Riley et al. | Oct 1989 |
Entry |
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Counterbalance advertising brochure, undated. |
Counterbalance torque Is Adjustable Compact, Frank Yeaple, Design News, Nov. 7, 1985. |
Counterbalance Advertising Letter and Brochure, undated. |