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- DescriptionEdwinHowardArmstrong.jpg English: Edwin Armstrong, FM radio inventor Date circa 1954 date QS:P,+1954-00-00T00:00:00Z/9,P1480,Q5727902 Source...(1,064 × 1,404 (768 KB)) - 21:01, 19 October 2022
- English Edwin Armstrong’s experimental FM radio transmitter determination method: SHA-1...(270 × 198 (19 KB)) - 09:15, 15 September 2023
- experimental triode by [[Lee De Forest]] (1906) in a 1914 radio by [[Edwin Howard Armstrong]] object has role: photographer author name string: Votpuske Wikimedia...(1,709 × 2,356 (307 KB)) - 10:44, 21 November 2023
- "Retjos Jichancas" in 1919 - The Monticola (IA monticola1919west) (page 200 crop).jpg...(1,070 × 1,552 (13.5 MB)) - 16:05, 4 September 2021
- bookplate, from- Roster of examining surgeons appointed under authority of the Commissioner of Pensions (IA 46020590R.nlm.nih.gov) (page 2 crop).jpg....(868 × 1,354 (2.97 MB)) - 22:57, 6 September 2020
- DescriptionEdwin Armstrong at blackboard.jpg English: American electrical engineer and inventor Edwin H. Armstrong in 1922. Armstrong is one of the most...(776 × 772 (294 KB)) - 15:23, 8 February 2024
- DescriptionEdwin Armstrong and superregenerative receiver.jpg English: American radio researcher Edwin H. Armstrong and his new invention, the superregenerative...(1,568 × 1,940 (1.02 MB)) - 17:58, 3 May 2021
- DescriptionEdwin Armstrong & portable superheterodyne.jpg English: US engineer Edwin Armstrong at beach with a portable superheterodyne radio receiver...(409 × 771 (68 KB)) - 19:57, 13 November 2020
- portable superheterodyne set that Armstrong built as a gift for her. Date 1923 Source http://www.k3dav.com/edwinhowardarmstrong.htm Author Unknown authorUnknown...(497 × 329 (24 KB)) - 01:08, 9 February 2024
- This file has an extracted image: Henry Alger Gildersleeve (page 44 crop).jpg....(918 × 1,333 (26.34 MB)) - 19:29, 21 May 2024
- This file has an extracted image: James A. Parsons (page 52 crop).jpg....(866 × 1,325 (36.5 MB)) - 03:26, 31 August 2023
- This file has an extracted image: Charles Seaforth Stewart (page 321 crop).jpg....(839 × 1,283 (19.19 MB)) - 11:36, 26 August 2023
- has an extracted image: "Chinese Section" (page 86) of San Francisco area Home telephone directory (IA hometelephonedir1910homed) (page 324 crop).jpg....(891 × 1,391 (27.11 MB)) - 00:07, 22 May 2024
- DescriptionEdwin Armstrong wife Esther and portable superhet radio 1923.jpg English: American engineer Edwin Armstrong the inventor of the superheterodyne...(153 × 295 (22 KB)) - 15:26, 27 January 2024
- American Madness ad - The Film Daily, Jul-Dec 1932 (page 134 crop).jpg...(3,273 × 4,295 (99.67 MB)) - 17:58, 16 September 2021
- manufactured by Lyon & Healy, Chicago Best in the World” ad- Libby Prison War Museum catalogue and program (IA libbyprisonwarmu02libb) (page 32 crop).jpg...(1,027 × 1,622 (3.22 MB)) - 17:09, 2 May 2022
- extracted image: "The No. 1A Folding Pocket Kodak" in 1900 - from, The British journal of photography (IA britishjournalof47unse) (page 136 crop).jpg....(1,200 × 1,729 (190.51 MB)) - 15:04, 5 July 2023
- Ernest William Winkler 1899 (page 27 crop).jpg...(1,358 × 1,429 (68.11 MB)) - 08:39, 3 May 2024
- Margaret Shippen by Major John Andre (page 159 crop).jpg...(996 × 1,500 (22.78 MB)) - 10:43, 24 August 2022
- Poultney Bigelow.jpg...(887 × 1,312 (14.14 MB)) - 17:31, 12 July 2022