Propulsion and Lift
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Jet - and ((power, propulsion)
(jet, turbojet)) - Rocket - Rocket powered flight
- Propeller - propeller or airscrew
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Fixed Wing - and ((fixed wing), (swing wing), (high wing), (single, dual)
wing, canard, (delta wing) ) - Rotory - and ((rotary wing), helicopter, heliocopter, rotor, gyrocopter, autogyro)
- Lighter than Air - and ((airship, (air ship), gasbag, (gas bag), helium, hydrogen, dirigible, blimp, zeppelin, balloon, inflate)
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| Propulsion and Lift | |||||||
| Issue | Number of Patents | Jet | Rocket | Propeller | Fixed Wing | Rotory | Lighter than Air |
| LOADING... (if you receive a warning 'restricted from running scripts' please 'Allow blocked content') | |||||||
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| 1971 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1972 | 2 | 2 | 0 | 0 | 0 | 0 | 0 |
| 1973 | 3 | 1 | 1 | 1 | 0 | 0 | 1 |
| 1974 | 4 | 2 | 0 | 0 | 0 | 3 | 0 |
| 1975 | 1 | 0 | 0 | 0 | 1 | 1 | 0 |
| 1976 | 2 | 2 | 0 | 0 | 0 | 1 | 0 |
| 1977 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| 1978 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
| 1980 | 4 | 0 | 0 | 1 | 0 | 2 | 1 |
| 1981 | 2 | 0 | 0 | 0 | 1 | 1 | 0 |
| 1982 | 1 | 0 | 0 | 0 | 1 | 0 | 0 |
| 1983 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1984 | 2 | 1 | 1 | 1 | 0 | 0 | 0 |
| 1985 | 2 | 0 | 2 | 2 | 0 | 0 | 0 |
| 1987 | 3 | 2 | 1 | 1 | 0 | 0 | 0 |
| 1988 | 3 | 0 | 2 | 2 | 0 | 0 | 1 |
| 1989 | 4 | 0 | 2 | 2 | 0 | 2 | 0 |
| 1990 | 3 | 0 | 0 | 0 | 1 | 2 | 0 |
| 1991 | 2 | 0 | 0 | 0 | 1 | 1 | 1 |
| 1992 | 4 | 3 | 1 | 1 | 0 | 0 | 1 |
| 1993 | 1 | 0 | 1 | 1 | 0 | 0 | 0 |
| 1994 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| 1995 | 2 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1996 | 6 | 2 | 1 | 1 | 1 | 2 | 1 |
| 1997 | 3 | 0 | 1 | 1 | 1 | 0 | 1 |
| 1998 | 3 | 1 | 0 | 0 | 0 | 2 | 1 |
| 1999 | 1 | 1 | 1 | 1 | 0 | 1 | 0 |
| 2000 | 6 | 2 | 1 | 1 | 2 | 1 | 1 |
| 2001 | 6 | 0 | 2 | 2 | 1 | 3 | 1 |
| 2002 | 11 | 3 | 3 | 3 | 1 | 5 | 2 |
| 2003 | 10 | 3 | 2 | 2 | 1 | 5 | 2 |
| 2004 | 5 | 2 | 1 | 1 | 2 | 2 | 0 |
| 2005 | 13 | 5 | 3 | 2 | 5 | 5 | 2 |
| 2006 | 13 | 2 | 2 | 2 | 4 | 4 | 2 |
| 2007 | 11 | 2 | 2 | 2 | 4 | 4 | 2 |
| 2008 | 2 | 0 | 0 | 0 | 1 | 1 | 0 |
| 2009 | 6 | 2 | 1 | 1 | 1 | 3 | 1 |
| 2010 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| 2011 | 2 | 1 | 0 | 0 | 0 | 1 | 0 |
| 2012 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
| 2015 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| No Issue | 16 | 7 | 3 | 3 | 0 | 9 | 3 |
| Total | 58 | 36 | 36 | 30 | 76 | 34 | |