|
| USD248734 | 2 Sep 1976 | 1 Aug 1978 | Perkins Research and Manufacturing Co. | Cable sheath continuity tester |
| USD249480 | 2 Aug 1976 | 19 Sep 1978 | J & M Instruments Corp. | PH Testing device |
| USD299909 | 17 Mar 1986 | 21 Feb 1989 | Associated Equipment Corporation | Portable battery tester |
| USD312421 | 4 Sep 1987 | 27 Nov 1990 | Hach Company | pH meter |
| USD633501 | 9 Jul 2010 | 1 Mar 2011 | WIS International | Hand-held data collector with removable scanner |
| USD646282 | 9 Jul 2010 | 4 Oct 2011 | WIS International | Hand-held data collector with removable scanner |
| USD660297 | 10 Jan 2011 | 22 May 2012 | WIS, International | Combined hand-held data collector base and detachable scanner |
