| Title | Owner | Description |
|---|---|---|
| Gatso | Sensys Gatso | Speed camera |
| Gib board | Winstone Wallboards | Plasterboard |
| Girl Scouts | Girl Scouts of the USA | Girl youth movement |
| Glad Wrap | Glad | Cling-film |
| Go-Kart | Mini racing cars | |
| Godrej | Cupboard | |
| Goodyear | Goodyear | Tyre |
| Gramophone | Gramophone Company | Record player |
| Granola | ? | Oats and fruit breakfast |
| Green Egg | Green Egg | Ceramic barbecue |
| Green Stuff | Kneadatite | Binary putty |
| Gummy Bear | Haribo | Sweet |
| Gyproc | Saint-Gobain | Plasterboard |
| Gypsy | 4x4 | |
| Hacky Sack | Wham-O | Footbag |
| Halls | Warner-Lambert Company | Cough suppressent tablet |
| Hammond Organ | Hammond | Organ |
| Handy | Motorola | Cell phone |
| Hansom cab | Hansom Cab Company | Horse-drawn carriage |
| Harmonic drive | Harmonic Drive Company | Strain wave gearing |
| Havaianas | Alpargatas | Flip flops |
| HEPA filter | United States government | Air filter |
| Heroin | Bayer | Hard drug |
| Hi-Lex | Hi-Lex Corporation | Bleach |
| Hi-liter | Avery Dennison Corporation | Highlighting marker |
| Hills Hoist | Hills Industries | Rotary clothes line |
| HMT | Government of India | Clock |
| Hoover | Hoover Company | Vacuum cleaner |
| Hoovercraft | Christopher Cockerell | Air cushion vehicle |
| Inbus | Bauer und Schaurte | Hex key |
| Indomie | Indofood | Instant noodle |
| iPhone | Apple | Smartphone |
| Iron lung | Mechanical respiratory device | |
| Isomo | Isolation material | |
| Jaffa | Hartwall Company | Soft drink |
| Jake brake | Jacobs Vehicle Systems | Compression release engine brake |
| Javel | Bleach | |
| Javex | Clorox Company | Bleach |
| Jaws of life | Hurst | Hydraulic rescue tool |
| JCB | J. C. Bamford | Backhoe loader |
| Jeep | Chrysler | Compact sport utility vehicle |
| Jell-O | Kraft Foods | Gelatin dessert or Jelly |
| Jenga | Leslie Scott | Tower block game |
| Jet Ski | Kawasaki | Water scooter |
| Jetway | JBT AeroTech | Passenger boarding bridge |
| Jiffy bag | Sealed Air | Padded mailing envelopes |
| Jockey Shorts | Coopers | Men's underwear |
| Jubilee clip | British Royal Navy | Hose clamp |
| JumboTron | Sony | Large-screen television |
| Jungle gym | ?? | Play structure |
