Navigation
-
GPS - and (GPS, geoposition
satellite) -
Celestial - and (astrolabe, sextant, octant, navigation
(celestial, astral, sighting, stellar)) -
Geographical - and ((terrain following), (navigation
(terrain, landmark, map, geography)) -
Autonomous - and ((navigation, guide, steer)
(independent, autonomous))) -
Radio-Control - and ((control
(radio, wireless)
Hide issues that do not have references in Navigation
| Navigation | ||||||
| Issue | Number of Patents | GPS | Celestial | Geographical | Autonomous | Radio-Control |
| LOADING... (if you receive a warning 'restricted from running scripts' please 'Allow blocked content') | ||||||
| Limit Display -> | ||||||
| 1971 | 1 | 0 | 1 | 0 | 0 | 0 |
| 1972 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1973 | 2 | 0 | 1 | 0 | 0 | 1 |
| 1974 | 1 | 0 | 1 | 0 | 0 | 0 |
| 1975 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1976 | 2 | 0 | 0 | 0 | 0 | 2 |
| 1977 | 2 | 0 | 1 | 0 | 0 | 1 |
| 1978 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1980 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1981 | 3 | 0 | 2 | 0 | 0 | 1 |
| 1982 | 1 | 0 | 0 | 0 | 0 | 1 |
| 1983 | 1 | 0 | 1 | 1 | 0 | 0 |
| 1984 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1985 | 1 | 0 | 1 | 0 | 0 | 0 |
| 1987 | 1 | 0 | 0 | 1 | 0 | 0 |
| 1988 | 3 | 0 | 2 | 0 | 0 | 1 |
| 1989 | 1 | 0 | 0 | 1 | 0 | 0 |
| 1990 | 1 | 0 | 0 | 1 | 0 | 0 |
| 1991 | 1 | 0 | 1 | 0 | 0 | 0 |
| 1992 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1993 | 2 | 0 | 0 | 2 | 0 | 1 |
| 1994 | 1 | 0 | 1 | 0 | 0 | 0 |
| 1995 | 2 | 0 | 1 | 0 | 0 | 1 |
| 1996 | 2 | 1 | 1 | 0 | 0 | 0 |
| 1997 | 2 | 0 | 0 | 0 | 0 | 2 |
| 1998 | 4 | 2 | 1 | 0 | 1 | 2 |
| 1999 | 2 | 1 | 0 | 0 | 0 | 1 |
| 2000 | 5 | 5 | 1 | 0 | 0 | 0 |
| 2001 | 8 | 3 | 2 | 2 | 1 | 0 |
| 2002 | 9 | 5 | 1 | 0 | 0 | 3 |
| 2003 | 14 | 8 | 2 | 0 | 1 | 6 |
| 2004 | 18 | 4 | 1 | 10 | 2 | 3 |
| 2005 | 15 | 6 | 1 | 3 | 2 | 7 |
| 2006 | 15 | 6 | 2 | 4 | 0 | 5 |
| 2007 | 3 | 2 | 0 | 0 | 0 | 2 |
| 2008 | 6 | 3 | 3 | 0 | 2 | 0 |
| 2009 | 6 | 5 | 1 | 0 | 0 | 1 |
| 2010 | 4 | 1 | 0 | 1 | 1 | 1 |
| 2011 | 3 | 0 | 1 | 0 | 0 | 2 |
| 2012 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2015 | 1 | 0 | 0 | 1 | 0 | 0 |
| No Issue | 10 | 0 | 1 | 2 | 6 | 2 |
| Total | 57 | 38 | 30 | 17 | 53 | |