Robert M Johnstone
Inventor
Stats
- 12 total patents issued
- 12 total patents filed
- most recent filing
This is official USPTO record data
Details
- 12 Issued Patents
- 12 Filed Patents
- 221 Total Citation Count
- Nov 12, 1997 Most Recent Filing
- Aug 4, 1983 Earliest Filing
Work History
| Patent Owner | Applications Filed | Year |
|---|---|---|
| Prolume, Inc. | 1
1 1 | 1993
1995 1997 |
| HUBBELL INCORPORATED | 2
1 2 2 1 | 1988
1989 1992 1993 1995 |
| G.B. BUILDING SYSTEMS CORPORATION | 1
1 1 | 1989
1993 1995 |
| SENTINEL LIGHTING WIRING SYSTEMS, INC. | 2
| 1988
|
| GENERAL SIGNAL CORPORATION | 1
| 1989
|
| DUAL-LITE MANUFACTURING, INC. | 1
| 1983
|
Inventor Addresses
| Address | Duration |
|---|---|
| 196 Lakeview Dr., Fairfield, CT 06430 | Sep 28, 93 - Sep 28, 93 |
| Fairfield, CT | Dec 05, 89 - Feb 22, 00 |
| Shelton, CT | Dec 31, 85 - Dec 31, 85 |
Technology Profile
| Technology | # of Patents | |
|---|---|---|
| F21S: | NON-PORTABLE LIGHTING DEVICES OR SYSTEMS THEREOF | 2 |
| F24S: | 1 | |
| G09F: | DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS | 6 |
Patents / Publication
| Patents / Publication # | Year of Publication / Issued | Title | Citations |
|---|---|---|---|
| 6,026,602 | 2000 | Apparatus and method of indirectly illuminating a sign | 23 |
| 5,768,814 | 1998 | Exit sign with removable emergency power pack module | 24 |
| 5,727,867 | 1998 | Canopy mounting device for exit signs and the like | 5 |
| 5,542,201 | 1996 | Indirectly illuminated sign | 14 |
| 5,461,550 | 1995 | Canopy mounting device for exit signs and the like | 25 |
